Malicious PDF — malware analysis report

Static analysis result for SHA-256 835dba414ffffee9…

MALICIOUS

PDF

31.5 KB Authoring application: Inkscape
MD5: ddc25a72eca157363deb6c33c64667ef SHA-1: 70bc74534d3da3d3f57dcab08348f98919e52c7e SHA-256: 835dba414ffffee9a998fcc83bf7d2c64a312b8a1ead4407848c746ca3263e41
150 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. It contains numerous embedded URLs pointing to external PDF documents hosted on various domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO abuse. The document body, though partially corrupted, contains text related to educational worksheets, which may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ssteeleenterprises.com/uploads/1/3/0/5/130551140/9283229.pdf
    • http://navyjunkremoval.com/uploads/1/3/0/4/130435725/5639060.pdf
    • http://nosborne.com/uploads/1/3/0/6/130620835/b40199.pdf
    • http://hellokendall.com/uploads/1/3/0/7/130738799/niwoxevirum.pdf
    • http://mrstinabullteacher.com/uploads/1/3/0/6/130621829/bumegax_jedozagarepipa_jovenavatarimej.pdf
    • http://phase2concerts.com/uploads/1/3/0/4/130491594/jezetazopivasol_dujit_jojukejalime.pdf
    • http://ninjadiveteam.com/uploads/1/3/0/4/130476538/damivonazexipawo.pdf
    • http://vediskastrologi.dk/uploads/1/3/0/4/130489649/8c2fb943e2156c0.pdf
    • http://soviet-shrek.com/uploads/1/3/0/6/130621480/mezokonotezugasufa.pdf
    • http://celsosim.com/uploads/1/3/0/5/130551374/pekadize_rifarupilotep_pizupomer_kesapotokiz.pdf
    • http://seizediem.com/uploads/1/3/0/6/130639822/130639822.html#nouns+verbs+adjectives+worksheet+3rd+grade

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001267.bin
6f368b16e381a970de6d67dd6677b646ee66536197797a95782d67e83bcd058c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1267 7568 bytes

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