Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f83fe8e9928b46…

MALICIOUS

PDF

28.2 KB Authoring application: Poppler-utils
MD5: 3a16d021e337b3a13217af78ab74cb5f SHA-1: 696c24a6502ac020e310e75f0ca87ef4e4fff647 SHA-256: c0f83fe8e9928b461ca077c392744b8c7528487f7225bee93730b2995b8f5f8e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and a critical heuristic detected a PDF link farm. The ML classifier also flagged this as highly malicious. No scripts were extracted, limiting the analysis of direct execution behavior.

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://oceanassassin.com/uploads/1/3/0/6/130620401/dogufiperaj_zejiruz.pdf
    • http://inboundtrain.net/uploads/1/3/0/6/130621160/nubudojorigevonugu.pdf
    • http://wondermentpress.com/uploads/1/3/0/4/130476185/molemabux.pdf
    • http://kaydumedia.com/uploads/1/3/0/4/130488445/desibibukare-mazudu-dovexemiv-nenovagutewa.pdf
    • http://rahimlovesnena.com/uploads/1/3/0/4/130483349/mubusajijov.pdf
    • http://healingpyramidenergy.com/uploads/1/3/0/5/130590217/ec6bf21f22d1.pdf
    • http://soccerskillschools.com/uploads/1/3/0/7/130775700/130775700.html#blastoid+transformation+mantle+cell+lymphoma

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001268.bin
20d8645a4b37410eacfc3e5f18b8b03bc1599db7783ae6d3050065c63e240f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1268 7028 bytes

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