Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba58c115d8b21d8…

MALICIOUS

PDF

36.6 KB Authoring application: PDF Studio
MD5: 02d0316f85c04338c24f8ea1d4fa6e03 SHA-1: b88e430afcec356fc504a9f6ccda9aca14b07758 SHA-256: 5ba58c115d8b21d849d79ddadb6a6bbbb5f8027698cbe69739b7daca2c5a78eb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule, indicating a large number of external links. The embedded URLs point to various domains, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the nature of the PDF and the embedded links strongly suggest an attempt to manipulate search engine results or redirect users to malicious content, aligning with phishing or SEO spam tactics.

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://krystalsforthespirit.com/uploads/1/3/0/5/130588346/5957005.pdf
    • http://rangerbaldy.net/uploads/1/3/0/7/130739373/tuweresowekot.pdf
    • http://lightingdesignlab.net/uploads/1/3/0/6/130621947/523384.pdf
    • http://movmentlab.com/uploads/1/3/0/2/130273748/5af5aa4.pdf
    • http://pameladirnberger.com/uploads/1/3/0/6/130621335/130621335.html#geometry+worksheet+classifying+triangles+answer+key
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001201.bin
5ebe8e9b26befd979de4e2b5f79bf00ea56a0b1de9468ddbe43f70913e928771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1201 8352 bytes
font_01_sfnt_off000053bd.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BD 2652 bytes

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