Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be1d381c8aa32d4…

MALICIOUS

PDF

43.1 KB Authoring application: Solid Converter PDF
MD5: c34e26d8acc8f4b7d43a864f7839d80c SHA-1: 2aff742e11f02abfa83a98382c96658baa2e3db7 SHA-256: 7be1d381c8aa32d4991d0b47682d489ad6457e77669da1f608c1d5a75841acda
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body contains irrelevant text and links, further supporting the idea that the primary purpose is to redirect users to external, potentially harmful, resources.

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://neli.russtin.com/uploads/2020/01/27/4373516.pdf
    • http://kcbevco.com/uploads/1/3/0/2/130272260/vifopi_pewerodoz_sikefemitut_mogejusekor.pdf
    • http://clutteredgypsie.com/uploads/1/3/0/3/130379821/xepil_makuzawidikusop_kekitojaj.pdf
    • http://millhouse-market.com/uploads/1/3/0/2/130289279/zezitamika_sutati.pdf
    • http://marinakarsh.ru/uploads/2020/01/28/vamitotenanagen.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/3/130379291/130379291.html#bengal+tiger+movie+lo+songs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000110f.bin
24323f4db680c83c56c4b50207a407cfe7f98827c066a268ced6b9cb2895fdba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F 9076 bytes

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