Malicious PDF — malware analysis report

Static analysis result for SHA-256 b541cced1ebcba03…

MALICIOUS

PDF

43.7 KB Authoring application: pdf-parser
MD5: 4df0f9547ea49e308ad6c06c94d116c3 SHA-1: aca03aa74a588b2bb883fb8186c0c2274c655e56 SHA-256: b541cced1ebcba031482f9beeeb0212bc11a0b6b7fee5e9dd0b82033672a1626
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links to other PDF files, a technique commonly used for SEO poisoning or phishing campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. No scripts were extracted from this sample, and the document body was heavily obfuscated, but the link farm is a strong indicator of malicious intent.

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://msiclick.com/uploads/1/3/0/6/130620931/e61a7e091a82ab.pdf
    • http://nothingeasylifestyle.com/uploads/1/3/0/2/130289371/eb8f27054.pdf
    • http://geowims.com/uploads/1/3/0/7/130739575/7155287.pdf
    • http://liveinemail.net/uploads/1/3/0/5/130588779/b39a2d9fb.pdf
    • http://nadjamoore.com/uploads/1/3/0/5/130540604/5486448.pdf
    • http://newsmandan.net/uploads/1/3/0/2/130287815/mugamadodebebux.pdf
    • http://oneaday.dance/uploads/1/3/0/6/130621826/1857497.pdf
    • http://blatherscatdesign.com/uploads/1/3/0/4/130483204/e79eb07b1.pdf
    • http://mercedregionalvision.com/uploads/1/3/0/4/130489123/6723791.pdf
    • http://newyearsknockout.com/uploads/1/3/0/5/130588821/55630c8bd26.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/3/130313605/130313605.html#zero+coupon+bond+maturity+formula

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001225.bin
d3c784db9cda69882e3f4ae40c3cc14298685075984b60659f5087f27625fe31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1225 8680 bytes
font_01_sfnt_off000064ac.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AC 16036 bytes

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