Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0037c4e3ecfebe…

MALICIOUS

PDF

38.2 KB Authoring application: Inkscape
MD5: 6b2cfd1db8195b58e607b2fb21e34fe5 SHA-1: 9d3673173a227c4ff4a5b79c1020cbf37dbce44a SHA-256: bc0037c4e3ecfebed020503cf5fd9f4b85d6973e95599ccb3843dea7bf0dd81b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, identified as a PDF_SEO_LINK_FARM heuristic. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further indicates a phishing or redirection intent. The document body, though heavily obfuscated, contains references to 'division facts worksheets for grade 1', suggesting a lure to disguise the malicious link farm. The primary attack pattern involves redirecting users to a network of external PDF files 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://cheyenne-janas.com/uploads/1/3/0/2/130271068/7095043.pdf
    • http://nerdsville.org/uploads/1/3/0/5/130543394/3646568.pdf
    • http://metalroofexpertwitness.com/uploads/1/3/0/6/130620640/3638150.pdf
    • http://poliotoolkit.org/uploads/1/3/0/5/130589114/fa6416e9.pdf
    • http://tammyandtommystravels.com/uploads/1/3/0/5/130551241/4236039.pdf
    • http://kokopellikikosandpackgoats.com/uploads/1/3/0/2/130289503/3008711.pdf
    • http://sproutmagazine.org/uploads/1/3/0/4/130476970/vegotawuze.pdf
    • http://assistensepay.live/uploads/1/3/0/2/130289760/76ad8e8240b377.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/6/130620460/130620460.html#division+facts+worksheets+for+grade+1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001196.bin
a0afd616e048616f53e9109ede33354dba14bdfd7577c9659cc414f6fea5e4b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1196 8180 bytes

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