Malicious PDF — malware analysis report

Static analysis result for SHA-256 81daafa6f8ef2514…

MALICIOUS

PDF

37.3 KB Authoring application: Serif PagePlus
MD5: 15ce56b330a1ce112fb2ce5edc6980d5 SHA-1: 2fda5c92dc79040bd382c6fda03f82bffcedbc0d SHA-256: 81daafa6f8ef2514408b035f2c9e74e0dea45f5f0ce28da2cd7ab581da565873
150 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classification and ClamAV, specifically flagged as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The critical heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external PDF links, suggesting a tactic to manipulate search engine results or distribute further malicious content. The document body contains obfuscated text and embedded URLs, reinforcing the phishing or content distribution intent.

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://highartphoto.net/uploads/1/3/0/6/130603810/sedoxutimunosudivov.pdf
    • http://photo-globe.com/uploads/1/3/0/5/130551625/bogipagutajo.pdf
    • http://domainwhois.biz/uploads/1/3/0/2/130288439/3021547.pdf
    • http://sonjalanehart.com/uploads/1/3/0/5/130588419/nesogatefafo_dosaniwajeli_ririremokavol.pdf
    • http://youthbuildillinois.org/uploads/1/3/0/6/130604351/togotozotobuji-papaboritoxe-javowewulinilaz-gowitofigedux.pdf
    • http://abby-yoga-massage.com/uploads/1/3/0/6/130604931/galevifug_xajave.pdf
    • http://moneytalkwithtiff.com/uploads/1/3/0/2/130272414/130272414.html#brasov+romania+map

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000117f.bin
01939838ebb29b202d6cd613e803a66944150f3d2cced3a7728e6b2cce7c1dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F 9012 bytes

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