Malicious PDF — malware analysis report

Static analysis result for SHA-256 8678ad3c17831dbb…

MALICIOUS

PDF

42.6 KB Authoring application: Adobe PDF Library 9.0
MD5: 2d5a2ee7aa91f6b98ceeb1b1d443be67 SHA-1: 681d058c58772aca819b3c6a919ab3481129cab1 SHA-256: 8678ad3c17831dbb1469b0be97a1cbaf5de94149bbb0dff663cd314bb10bc37d
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The primary indicator is the presence of a large number of external links, identified as a 'PDF_SEO_LINK_FARM'. These links likely serve to redirect users to malicious content or to manipulate search engine rankings. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://silentlyfallen.org/uploads/1/3/0/7/130775833/vegutezuzuf.pdf
    • http://mydeckstairity.com/uploads/1/3/0/6/130604136/wagixopi.pdf
    • http://colorsinthewind.org/uploads/1/3/0/7/130738497/c6c941115245.pdf
    • http://traffics.site/uploads/1/3/0/7/130775918/ff258cc42bdfdb.pdf
    • http://www.liga30panama.com/uploads/1/3/0/6/130621098/mizepexe.pdf
    • http://nasty-man.com/uploads/1/3/0/4/130483769/pumifimine-zepedolat-pidideki-fabiruzi.pdf
    • http://fwdrywall.com/uploads/1/3/0/7/130740266/2852719.pdf
    • http://karamckinney.net/uploads/1/3/0/7/130775169/9280542.pdf
    • http://slatteneyecare.com/uploads/1/3/0/6/130620843/7eacc0db2.pdf
    • http://www.mynormanrockwell.org/uploads/1/3/0/6/130639563/dibifawudom.pdf
    • http://www.spaclassified.com/uploads/1/3/0/7/130739520/130739520.html#fmea+training+exercise

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005129.bin
3b65b33cc8c98ec7482cdbe759fd00bda95825a52f8f16d50b63c2b70bbe85f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5129 7964 bytes

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