Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c9245065ececb1…

MALICIOUS

PDF

31.6 KB Authoring application: OpenOffice Draw
MD5: 1a20dea2f6a132a669e083fe34a28bf0 SHA-1: 3b76a9dddfdba63e4436f816508e950553ecfc95 SHA-256: c1c9245065ececb16b6f330b82eb3dc1ff3d4acd0a0b71bd61159648b13a3ebf
150 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 PDF files, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate a phishing or traffic redirection scheme. The ML classifier also flagged this PDF with a high probability of being malicious. The document body contains seemingly random text mixed with URLs, further supporting the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://solarscrappers.com/uploads/1/3/0/2/130287521/3470410.pdf
    • http://mvctk.com/uploads/1/3/0/6/130620293/3839865.pdf
    • http://cheapmarketplacedeals.com/uploads/1/3/0/6/130620429/virowup_zotapu_vigelek_sewel.pdf
    • http://newperspectivemedical.com/uploads/1/3/0/6/130621467/130621467.html#kalyana+vaibhogame+mp3

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fa4.bin
9f82de4b32ab4540307a2e6e7bab5721f70e8a331b7cf409322fa6b182ccb026		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4 7952 bytes

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