Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c6a9a907cb1dfc…

MALICIOUS

PDF

26.7 KB Authoring application: ImageMagick
MD5: 0a1df937e329f45f892cd9f86a1c5075 SHA-1: cf07015893c6ecd389737c4dc5a217ac91594433 SHA-256: 31c6a9a907cb1dfc5bfabcab0400005ea928df94820ad2a75ca89ff567257f61
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body contains numerous URLs pointing to external PDF files hosted on various domains. This indicates a likely phishing or traffic-driving campaign, where the embedded links are designed to lure users to malicious content.

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://nethermossarchers.com/uploads/1/3/0/3/130313199/lusilogowarir.pdf
    • http://nataliyatodorportfolio.com/uploads/1/3/0/6/130604788/0759e1b3484d259.pdf
    • http://krystalsforthespirit.com/uploads/1/3/0/7/130740258/5019278.pdf
    • http://amusethemeparks.com/uploads/1/3/0/6/130621946/4259ba2.pdf
    • http://mymeds.info/uploads/1/3/0/4/130477249/bufamijon-pusopogowaraxu-pesuz.pdf
    • http://southernfertilityandsurgery.com/uploads/1/3/0/2/130287898/dogemipugoni_lulebabibepuko_runuma.pdf
    • http://drpatty.net/uploads/1/3/0/5/130542937/130542937.html#ukulele+chords+songs+hindi

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001043.bin
60b1a430e9accb32a821caf92d8b81ee63e489f8e6d1d62fac4a6aa2c27c1a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1043 6668 bytes

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