Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fd827917eece58…

MALICIOUS

PDF

40.4 KB Authoring application: Serif PagePlus
MD5: 90fc9913c715fe5c87ad403b0701ae37 SHA-1: cd6b70cd76fd8e9eb49841cfb17386deadc5a45d SHA-256: c6fd827917eece584b47dbb3553c0e037b5a8ee018428a5e32e7f15104f9c86c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external websites, masquerading as free fax cover letter templates. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' confirms its malicious nature. The document body text further reinforces the lure by mentioning 'Free fax cover letter template word'. The primary attack pattern involves directing users to a network of potentially malicious sites.

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://salgadosgourmet.net/uploads/1/3/0/5/130543941/90717511a.pdf
    • http://europimec.org/uploads/1/3/0/5/130543198/0eb90a.pdf
    • http://my-minis.com/uploads/1/3/0/6/130620943/wufederema_rotijutabituvu.pdf
    • http://chitoys.store/uploads/1/3/0/2/130289793/b6b661d65d6e8.pdf
    • http://faguxisom.pweuxk.xyz/uploads/2020/01/28/sunovajepew.pdf
    • http://rjmlandscaping.info/uploads/1/3/0/6/130640040/aa4bfd1dfc61.pdf
    • http://monicacarrollart.com/uploads/1/3/0/6/130621158/9801869.pdf
    • http://chewoncakes.com/uploads/1/3/0/5/130539109/130539109.html#free+fax+cover+letter+template+word

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001161.bin
47befacda3a7264c973097926b8eb0b425e18db4194352acf6abb95cd356879a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1161 8004 bytes

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