Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c5c2fd92e23dde…

MALICIOUS

PDF

36.8 KB Authoring application: pstoedit
MD5: 4b47ee3073c8f6c1297c8b577fc3bd59 SHA-1: 67869e829eef11c085bc541a3d3abd820cfe6605 SHA-256: 28c5c2fd92e23dde96510029779c541459fd5698b0683c49239bb75cda835fd6
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection also flags this as Pdf.Phishing.TtraffRobotInstall. The document body, though heavily obfuscated, contains references to the URLs, suggesting a deliberate attempt to create a link farm. The primary goal appears to be redirecting users to a network of other documents hosted on various domains.

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://borocreditrepair.com/uploads/1/3/0/4/130494478/fozuwakeladupawego.pdf
    • http://ctechpcs.com/uploads/1/3/0/5/130588716/safiviziperubevegabu.pdf
    • http://ccfammo.com/uploads/1/3/0/4/130436202/5885370.pdf
    • http://jingleexpert.com/uploads/1/3/0/5/130543991/lapasapupo.pdf
    • http://nickgreen68.com/uploads/1/3/0/3/130323227/wizalepe_jalanuwe.pdf
    • http://nanny101.net/uploads/1/3/0/5/130539908/lezomasuxinifo.pdf
    • http://nadi-haas.de/uploads/1/3/0/4/130483138/130483138.html#civil+autocad+3d+commands+with+examples+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010fc.bin
f5e30d46e7f95097c66a36c5142c44ab56fb6f76b9d00d6e008457c61c43d6ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC 8176 bytes

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