Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff5718f7544a832…

MALICIOUS

PDF

30.1 KB Authoring application: QPDF
MD5: 9e021427119bf87756087d1da2d16c74 SHA-1: b202361f6e3cb3d75fe36e709deeb741b36a4acb SHA-256: aff5718f7544a832dd3a94b7a4d399f6331038b0e9b068602189128ddc6a5445
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of external links to other PDF files, a technique commonly used for SEO poisoning and phishing. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support a malicious classification. The embedded URLs are likely part of a campaign to redirect users to malicious content, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://centreformindfulness.ca/uploads/1/3/0/5/130539009/vikotat.pdf
    • http://illuminatedflowers.com/uploads/1/3/0/4/130478259/1791294.pdf
    • http://scentedpens.com/uploads/1/3/0/6/130620757/dc990a4ecd0.pdf
    • http://mountaincreeklodging.com/uploads/1/3/0/6/130639540/6e2230d8014d721.pdf
    • http://monkeyfolio.com/uploads/1/3/0/6/130621327/4543375.pdf
    • http://hinomaru-sumo.ru/uploads/2020/01/28/3723675.pdf
    • http://beingself-centered.com/uploads/1/3/0/5/130540208/130540208.html#vaaste+movie+songs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000104e.bin
c4ed99bfb6c59843ed39d8edb1b1b6cf2485d689184ad62a042310b4583be7ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E 7752 bytes

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