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What is PDFPros?The Malwarebytes research team has determined that PDFPros is a search hijacker. These so-called "hijackers" manipulate your browser(s), for example to change your startpage or searchscopes, so that the affected browser visits their site or one of their choice.This particular one is a search hijacker and uses web push notifications.How do I know if my computer is affected by PDFPros?You may see this entry in your list of installed Chrome extensions:and these warnings during install:You will see this icon in your Chrome menu-bar:and these changed settings:How did PDFPros get on my computer?Browser hijackers use different methods for distributing themselves. This particular one was downloaded from the webstore:after a redirect from their website:How do I remove PDFPros?Our program Malwarebytes can detect and remove this potentially unwanted program. Please download Malwarebytes to your desktop. Double-click mb3-setup-consumer-{version}.exe and follow the prompts to install the program. Then click Finish. Once the program has fully updated, select Scan Now on the Dashboard. Or select the Threat Scan from the Scan menu. If another update of the definitions is available, it will be implemented before the rest of the scanning procedure. When the scan is complete, make sure that all Threats are selected, and click Remove Selected. Restart your computer when prompted to do so. Is there anything else I need to do to get rid of PDFPros? No, Malwarebytes removes PDFPros completely. If you have allowed the notifications you can read here how to disable them. How would the full version of Malwarebytes help protect me?We hope our application and this guide have helped you eradicate this hijacker.As you can see below the full version of Malwarebytes would have protected you against the PDFPros hijacker. It would have blocked their website, giving you a chance to stop before it became too late. Technical details for expertsPossible signs in FRST logs: CHR DefaultSearchURL: Default -> hxxps://feed.pdfpros.com/?q={searchTerms}&publisher=pdfpros&barcodeid=544300000000000 CHR DefaultSearchKeyword: Default -> PDFPros CHR DefaultSuggestURL: Default -> hxxps://api.pdfpros.com/suggest/get?q={searchTerms} CHR Extension: (PDFPros) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg [2019-08-14] Alterations made by the installer: File system details [View: All details] (Selection) --------------------------------------------------- Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0 Adds the file closer.js"="9/13/2017 11:07 AM, 15 bytes, A Adds the file manifest.json"="8/14/2019 9:08 AM, 2242 bytes, A Adds the file popup.html"="12/31/2018 1:38 PM, 1141 bytes, A Adds the file tab.html"="9/13/2017 11:07 AM, 165 bytes, A Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\_metadata Adds the file computed_hashes.json"="8/14/2019 9:08 AM, 2561 bytes, A Adds the file verified_contents.json"="1/15/2019 8:07 AM, 2947 bytes, A Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images Adds the file how-1.png"="12/31/2018 1:38 PM, 2862 bytes, A Adds the file how-2.png"="12/31/2018 1:38 PM, 3247 bytes, A Adds the file logo-small.png"="12/31/2018 1:38 PM, 1109 bytes, A Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images\icons Adds the file 128x128.png"="8/14/2019 9:08 AM, 1621 bytes, A Adds the file 16x16.png"="8/14/2019 9:08 AM, 527 bytes, A Adds the file 64x64.png"="8/14/2019 9:08 AM, 1281 bytes, A Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\scripts Adds the file background.js"="1/17/2019 2:22 PM, 31608 bytes, A Adds the file jquery-3.3.1.min.js"="12/31/2018 1:38 PM, 86927 bytes, A Adds the file popup.js"="12/31/2018 1:38 PM, 568 bytes, A Adds the file sitecontent.js"="12/31/2018 1:38 PM, 77 bytes, A Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\styles Adds the file popup.css"="12/31/2018 1:38 PM, 1270 bytes, A Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Web Applications\_crx_dfhbfihajlehdolghpaempnfihmeopeg Adds the file PDFPros.ico"="8/14/2019 9:08 AM, 159726 bytes, A Adds the file PDFPros.ico.md5"="8/14/2019 9:08 AM, 16 bytes, A Registry details [View: All details] (Selection) ------------------------------------------------ [HKEY_CURRENT_USER\Software\Google\Chrome\PreferenceMACs\Default\extensions.settings] "dfhbfihajlehdolghpaempnfihmeopeg"="REG_SZ", "BB9973E71C0982B74DBE741630C725A42E874243EFAF7F166EF9F2C786D7522E" Malwarebytes log: Malwarebytes www.malwarebytes.com -Log Details- Scan Date: 8/14/19 Scan Time: 9:18 AM Log File: a5ca0f46-be63-11e9-9c1a-00ffdcc6fdfc.json -Software Information- Version: 3.8.3.2965 Components Version: 1.0.613 Update Package Version: 1.0.11999 License: Premium -System Information- OS: Windows 7 Service Pack 1 CPU: x64 File System: NTFS User: {computername}\{username} -Scan Summary- Scan Type: Threat Scan Scan Initiated By: Manual Result: Completed Objects Scanned: 236355 Threats Detected: 29 Threats Quarantined: 29 Time Elapsed: 5 min, 48 sec -Scan Options- Memory: Enabled Startup: Enabled Filesystem: Enabled Archives: Enabled Rootkits: Enabled Heuristics: Enabled PUP: Detect PUM: Detect -Scan Details- Process: 0 (No malicious items detected) Module: 0 (No malicious items detected) Registry Key: 0 (No malicious items detected) Registry Value: 1 PUP.Optional.PDFPros, HKCU\SOFTWARE\GOOGLE\CHROME\PREFERENCEMACS\Default\extensions.settings|dfhbfihajlehdolghpaempnfihmeopeg, Quarantined, [348], [716810],1.0.11999 Registry Data: 0 (No malicious items detected) Data Stream: 0 (No malicious items detected) Folder: 7 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images\icons, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\_metadata, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\scripts, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\styles, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\DFHBFIHAJLEHDOLGHPAEMPNFIHMEOPEG, Quarantined, [348], [716810],1.0.11999 File: 21 PUP.Optional.PDFPros, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\DFHBFIHAJLEHDOLGHPAEMPNFIHMEOPEG\2.1.0_0\MANIFEST.JSON, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images\icons\128x128.png, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images\icons\16x16.png, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images\icons\64x64.png, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images\how-1.png, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images\how-2.png, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\images\logo-small.png, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\scripts\background.js, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\scripts\jquery-3.3.1.min.js, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\scripts\popup.js, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\scripts\sitecontent.js, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\styles\popup.css, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\_metadata\computed_hashes.json, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\_metadata\verified_contents.json, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\closer.js, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\popup.html, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\dfhbfihajlehdolghpaempnfihmeopeg\2.1.0_0\tab.html, Quarantined, [348], [716810],1.0.11999 PUP.Optional.PDFPros, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, [348], [716808],1.0.11999 PUP.Optional.PDFPros, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, [348], [716808],1.0.11999 Physical Sector: 0 (No malicious items detected) WMI: 0 (No malicious items detected) (end) As mentioned before the full version of Malwarebytes could have protected your computer against this threat.We use different ways of protecting your computer(s): Dynamically Blocks Malware Sites & Servers Malware Execution Prevention Save yourself the hassle and get protected.