Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4be9a6b7b752aba…

MALICIOUS

PDF

41.0 KB Authoring application: ImageMagick
MD5: ee5c959f325a71e06870cd9d3a0b899a SHA-1: f9afe73e4dda531243bf3ef3cc8063ed2f850061 SHA-256: b4be9a6b7b752aba9223ec7ccab64a7aeeb1a14a542431673179401858250f8a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a phishing or SEO manipulation campaign. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted, and the document body was truncated, limiting further analysis of specific user-facing lures.

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://briggsbrood.com/uploads/1/3/0/6/130621839/e53ce9c.pdf
    • http://careersinmentalhealth.com/uploads/1/3/0/5/130590532/330d4f22ba1e.pdf
    • http://www.originalpancakehousesavannah.com/uploads/1/3/0/4/130490584/3442814.pdf
    • http://ottica2g.com/uploads/1/3/0/9/130969177/5217749.pdf
    • http://cmnelpaso.org/uploads/1/3/0/4/130483348/gawotudoj.pdf
    • http://www.readersbeware.com/uploads/1/3/0/7/130740607/08d4b942a057.pdf
    • http://garybrumley.com/uploads/1/3/0/6/130639277/2284843.pdf
    • http://www.homefinderforme.com/uploads/1/3/0/7/130775328/f91fa5870f13d5.pdf
    • http://mustardgreen.net/uploads/1/3/0/2/130287934/tilirezobetamar.pdf
    • http://bestknoxvilleattorney.com/uploads/1/3/0/8/130813373/fatowemusefisisomal.pdf
    • http://bearsvbabiesgame.com/uploads/1/3/0/8/130874591/9450488.pdf
    • http://alexmcmichael.com/uploads/1/3/0/5/130550696/130550696.html#how+to+find+the+zeros+of+a+polynomial+function+by+factoring

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004907.bin
bbb3b4d30c2e2a495905227999cc16794694fc1e7c8a2b1e46685bb757975d01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4907 8212 bytes

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