Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f312b19e147a8b4…

MALICIOUS

PDF

44.2 KB Authoring application: Adobe PDF Library 9.0
MD5: b6a9327bb6605cea9c8af6ac5b80a78b SHA-1: 9af87dcd2399aa042408021402b6b8ea88b270f1 SHA-256: 4f312b19e147a8b460e7e2571db2f3d335286f2bb7f4ca73c9e1e1cf4b914249
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. This suggests a link farm or redirection mechanism designed to lead users to malicious content. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a phishing or traffic-driving intent. The document body contains seemingly unrelated text about an accounting officer cover letter, which is likely a lure.

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://legionsupplements.net/uploads/1/3/0/3/130313108/4229951.pdf
    • http://cammontv.com/uploads/1/3/0/6/130639315/8978759.pdf
    • https://gegifukomi.weebly.com/uploads/1/3/0/5/130543239/bujogezowovukup.pdf
    • http://simonbaatz.org/uploads/1/3/0/2/130289244/1840873.pdf
    • https://dodetakibuk.weebly.com/uploads/1/3/0/6/130604731/wokokotewojaxedat.pdf
    • http://joychristiancenterchurch.com/uploads/1/3/0/2/130291434/taduxuki_sudozubalog.pdf
    • http://purebarretexasstrong.com/uploads/1/3/0/5/130543276/6833190.pdf
    • http://bellabee.org/uploads/1/3/0/2/130289453/803909.pdf
    • http://aninconvenientcommute.com/uploads/1/3/0/8/130814043/fobab_pevafulakodeji_zitezegazoza_xajowume.pdf
    • http://mysifortenbery.com/uploads/1/3/0/6/130620945/59768.pdf
    • http://norecordsnobs.com/uploads/1/3/0/4/130483086/a2d8a39f.pdf
    • http://atlanta-treeservice.com/uploads/1/3/0/2/130271165/130271165.html#accounting+officer+cover+letter+example

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000132f.bin
6a7fe73d0e4c6e532373e70304d25422df69073e8338ab8f2e178bf8bc31a418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132F 9096 bytes

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