Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24321e6f24b63f2…

MALICIOUS

PDF

29.5 KB Authoring application: Nitro PDF
MD5: bb63566831ab60b945f4b7d99f4a0b1e SHA-1: 688127a011755770f9923d98fb0bbe3fb68b053b SHA-256: f24321e6f24b63f2885a70d27a03c4e84eaebf3cf78bd355d1ff0ea271d41cba
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to external PDF files, a technique commonly used in phishing and malware distribution campaigns. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly indicate a phishing or malware distribution intent. The document body text, though partially corrupted, mentions 'Stedman's medical dictionary software free', serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mountainhighs.net/uploads/1/3/0/3/130323672/nubuvolugat.pdf
    • http://seguro-property-management.com/uploads/1/3/0/6/130604527/1732905.pdf
    • http://chitoys.store/uploads/1/3/0/3/130313093/jaxovuxum_ravijatug.pdf
    • http://meshayla.com/uploads/1/3/0/5/130539654/130539654.html#stedman%27+s+medical+dictionary+software+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000ff3.bin
69011d63d47a7cd9f517ad6a06b860f45f203b61fa1b9ac3143094d3c7d67bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3 8400 bytes

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