Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b48f8af409ae99b…

MALICIOUS

PDF

44.4 KB Authoring application: Soda PDF
MD5: 4a7ff26a3db3cf718516e87309ece478 SHA-1: 145b94d66fcc3885da6ff4fc2511695111971231 SHA-256: 5b48f8af409ae99bcb378e4ed48608f814edb7ae3e47b43e8cb741a6cd8ecd91
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicative of a link farm or SEO poisoning attack. ClamAV detected this file as Pdf.Phishing.TtraffRobotInstall-7605656-0, and a machine learning classifier also flagged it as malicious. The embedded links are the primary IOCs, suggesting a campaign to drive traffic or distribute further 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://jetsetsocial.com/uploads/1/3/0/4/130483909/5112523.pdf
    • http://stylebyquilo.com/uploads/1/3/0/8/130813786/zenakukur.pdf
    • http://fhs-pto.com/uploads/1/3/0/2/130291702/116888dfd628552.pdf
    • http://knifelawinsider.com/uploads/1/3/0/4/130483294/989264.pdf
    • http://grammarclass.us/uploads/1/3/0/7/130775862/nonamipepigilonize.pdf
    • http://joekreydt.com/uploads/1/3/0/8/130813320/3471346.pdf
    • http://daydreambakery.com/uploads/1/3/0/5/130543190/48f2e6a.pdf
    • http://www.capoeira-nj.com/uploads/1/3/0/6/130639249/gusuta-lawafelafenur-pazip.pdf
    • http://brendanfletcher.com/uploads/1/3/0/6/130639851/1919094.pdf
    • http://musake.net/uploads/1/3/0/6/130604885/2918019.pdf
    • http://isocare.org/uploads/1/3/0/5/130588468/pomirixapevajobam.pdf
    • http://www.pagiptv.com/uploads/1/3/0/3/130313378/11ef0402a4ab88.pdf
    • http://neilcopes.com/uploads/1/3/0/2/130270866/2399659.pdf
    • http://centreelmos.com/uploads/1/3/0/7/130739169/neves.pdf
    • http://m999g.salon225.com/uploads/1/3/0/4/130483983/130483983.html#slow+dancing+in+a+burning+room+tabs+ukulele

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c6a.bin
b0ea7b80e50d4d094fab5ca7a3f0e6722a00ead146c526ef64a6ab883f564320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C6A 8516 bytes

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