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FP on for downloads.pdf-xchange.com

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I hope you can help us.  We have found that the MalwareBytes Add-In for Firefox is giving a false positive report to users who are downloading our software from hxxps://www.tracker-software.com/product/downloads

I have searched for other reports in this forum and found none.    I've read and followed these:

  • hxxps://forums.malwarebytes.com/topic/20806-important-please-read-before-reporting-a-false-positive/
  • hxxps://forums.malwarebytes.com/topic/21076-info-malicious-website-blocking/

The URL and IP address belong to CacheFly (hxxps://www.cachefly.com/) who provide a CDN for our product delivery.  They say they have had no other similar reports to date.

The URL is currently resolving to

~$ dig downloads.pdf-xchange.com

; <<>> DiG 9.10.3-P4-Ubuntu <<>> downloads.pdf-xchange.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61608
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

; EDNS: version: 0, flags:; udp: 512
;downloads.pdf-xchange.com.     IN      A

downloads.pdf-xchange.com. 299  IN      CNAME   pdfxchange.cachefly.net.
pdfxchange.cachefly.net. 3599   IN      CNAME   vip1.g5.cachefly.net.
vip1.g5.cachefly.net.   3599    IN      A

;; Query time: 74 msec
;; WHEN: Sun May 03 16:39:05 PDT 2020
;; MSG SIZE  rcvd: 129

MalwareBytes installed application does mot seem to suffer the issue, I have to date only been able to reproduce this with the Firefox Add-In.

Can you help?


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If it helps, this is what we see:


This is the URL:


Please and thanks,



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  • Staff

I have whitelisted it.  Please try again after 30 minutes (or so) and let me know if downloads are happening as expected.

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