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What is MyPDFSearch?

The Malwarebytes research team has determined that MyPDFSearch 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.

How do I know if my computer is affected by MyPDFSearch?

You may see this entry in your list of installed Chrome extensions:

main.png

and this changed setting:

warning5.png

You may have noticed these warnings during install:

warning1.png

warning2.png

warning3.png

How did MyPDFSearch get on my computer?

Browser hijackers use different methods for distributing themselves. This particular one was downloaded from the webstore:

webstore.png

after a redirect from their website:

website.png

How do I remove MyPDFSearch?

Our program Malwarebytes can detect and remove this search hijacker.

  • Please download Malwarebytes for Windows to your desktop.
  • Double-click MBSetup.exe and follow the prompts to install the program.
  • When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
  • Click on the Get started button.
  • Click Scan to start a Threat Scan.
  • When the scan is finished click Quarantine to remove the found threats.
  • Reboot the system if prompted to complete the removal process.

Is there anything else I need to do to get rid of MyPDFSearch?

  • No, Malwarebytes removes MyPDFSearch completely.

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 Malwarebytes Browser Guard, and the full version of Malwarebytes would have protected you against the MyPDFSearch hijacker. It would have blocked their website, giving you a chance to stop it before it became too late.


 

protection1.png

 

protection2.png

 

Technical details for experts

Possible signs in FRST logs:


 

CHR DefaultSearchURL: Default -> hxxps://feed.mypdf-search.com/?q={searchTerms}&publisher=mypdfsearch&barcodeid=579310000000000
CHR DefaultSearchKeyword: Default -> MyPDFSearch
CHR DefaultSuggestURL: Default -> hxxps://api.mypdf-search.com/suggest/get?q={searchTerms}
CHR Extension: (MyPDFSearch) - C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\lfdiclbjpggcpkgmnphnbnncmbikcolc [2020-09-11]

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\lfdiclbjpggcpkgmnphnbnncmbikcolc\1.1.0_0
       Adds the file manifest.json"="9/11/2020 9:01 AM, 2078 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\lfdiclbjpggcpkgmnphnbnncmbikcolc\1.1.0_0\_metadata
       Adds the file computed_hashes.json"="9/11/2020 9:01 AM, 6255 bytes, A
       Adds the file verified_contents.json"="7/29/2020 10:56 AM, 2049 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\lfdiclbjpggcpkgmnphnbnncmbikcolc\1.1.0_0\images
       Adds the file logo-white-text.png"="7/29/2020 10:56 AM, 0 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\lfdiclbjpggcpkgmnphnbnncmbikcolc\1.1.0_0\images\icons
       Adds the file 128x128.png"="9/11/2020 9:01 AM, 7561 bytes, A
       Adds the file 16x16.png"="9/11/2020 9:01 AM, 644 bytes, A
       Adds the file 64x64.png"="9/11/2020 9:01 AM, 3687 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Extensions\lfdiclbjpggcpkgmnphnbnncmbikcolc\1.1.0_0\scripts
       Adds the file background.js"="7/29/2020 10:56 AM, 514561 bytes, A
       Adds the file sitecontent.js"="7/29/2020 10:56 AM, 77 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\lfdiclbjpggcpkgmnphnbnncmbikcolc
       Adds the file 000003.log"="9/11/2020 9:07 AM, 843 bytes, A
       Adds the file CURRENT"="9/11/2020 9:01 AM, 16 bytes, A
       Adds the file LOCK"="9/11/2020 9:01 AM, 0 bytes, A
       Adds the file LOG"="9/11/2020 9:01 AM, 184 bytes, A
       Adds the file MANIFEST-000001"="9/11/2020 9:01 AM, 41 bytes, A
    Adds the folder C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Web Applications\_crx_lfdiclbjpggcpkgmnphnbnncmbikcolc
       Adds the file MyPDFSearch.ico"="9/11/2020 9:01 AM, 190235 bytes, A
       Adds the file MyPDFSearch.ico.md5"="9/11/2020 9:01 AM, 16 bytes, A

Registry details [View: All details] (Selection)
------------------------------------------------
    [HKEY_CURRENT_USER\Software\Google\Chrome\PreferenceMACs\Default\extensions.settings]
       "lfdiclbjpggcpkgmnphnbnncmbikcolc"="REG_SZ", "11D336DCCA7458A8BDCCE1E278DB0CA0EB6835033E354FD684E7F87DDD7EB905"

Malwarebytes log:
 

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 9/11/20
Scan Time: 9:13 AM
Log File: 482bf580-f3fe-11ea-96af-00ffdcc6fdfc.json

-Software Information-
Version: 4.2.0.82
Components Version: 1.0.1036
Update Package Version: 1.0.29675
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: 231522
Threats Detected: 11
Threats Quarantined: 11
Time Elapsed: 4 min, 42 sec

-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Disabled
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
Adware.SearchEngineHijack.Generic, HKCU\SOFTWARE\GOOGLE\CHROME\PREFERENCEMACS\Default\extensions.settings|lfdiclbjpggcpkgmnphnbnncmbikcolc, Quarantined, 15304, 799722, , , , , , 

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 2
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Sync Extension Settings\lfdiclbjpggcpkgmnphnbnncmbikcolc, Quarantined, 15304, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\LFDICLBJPGGCPKGMNPHNBNNCMBIKCOLC, Quarantined, 15304, 799722, 1.0.29675, , ame, , , 

File: 8
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Secure Preferences, Replaced, 15304, 799722, , , , , 389C90311A1EC782FD3804C610C120FB, CD0D0F1AFDD0F4672489AF410903464A80BB82128FC3865D5F165A5BEE9D1A18
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\Default\Preferences, Replaced, 15304, 799722, , , , , 000389D79F5C467DBF948213BC21F5AF, 4F2A28A5D3DA8038E39A0B748F1689AEC19A02CB38920DA14766F167DE9DE2D1
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\lfdiclbjpggcpkgmnphnbnncmbikcolc\000003.log, Quarantined, 15304, 799722, , , , , 8DDBDF1E1B045802FC59AD3DB8987BCC, CD2740AEE9E898CB76311F7F76B9B19B6DC8B62088E39E1C14656248CE6A7F5B
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\lfdiclbjpggcpkgmnphnbnncmbikcolc\CURRENT, Quarantined, 15304, 799722, , , , , 46295CAC801E5D4857D09837238A6394, 0F1BAD70C7BD1E0A69562853EC529355462FCD0423263A3D39D6D0D70B780443
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\lfdiclbjpggcpkgmnphnbnncmbikcolc\LOCK, Quarantined, 15304, 799722, , , , , , 
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\lfdiclbjpggcpkgmnphnbnncmbikcolc\LOG, Quarantined, 15304, 799722, , , , , 1DCA15BC0222CF46DA97581AED481D13, 2EF6BD7601AAD8E798645C20414CAC4324BDEB75237E3F9868FC430A7D6D5222
Adware.SearchEngineHijack.Generic, C:\Users\{username}\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\lfdiclbjpggcpkgmnphnbnncmbikcolc\MANIFEST-000001, Quarantined, 15304, 799722, , , , , 5AF87DFD673BA2115E2FCF5CFDB727AB, F9D31B278E215EB0D0E9CD709EDFA037E828F36214AB7906F612160FEAD4B2B4
Adware.SearchEngineHijack.Generic, C:\USERS\{username}\APPDATA\LOCAL\GOOGLE\CHROME\USER DATA\DEFAULT\EXTENSIONS\LFDICLBJPGGCPKGMNPHNBNNCMBIKCOLC\1.1.0_0\MANIFEST.JSON, Quarantined, 15304, 799722, 1.0.29675, , ame, , 4D12FCCA06C6C783915BC88599220E13, AF88B6CBE62F6FEEC5393524879A020628D564344EA2C5280FDBC30E8FA5DDB2

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.

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