Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53a937c1e832bf5…

MALICIOUS

PDF

33.4 KB Authoring application: Adobe PDF Library 9.0
MD5: 9e250dc470d7c0c04b6266580c1b84ea SHA-1: 977f9b06127ef5f7854e7c8bc7b032ae1bae94f4 SHA-256: a53a937c1e832bf5de751aeeda4f8f291acc03da20056645ce15fdbdfeb3cf0c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a common technique for SEO poisoning or phishing campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs likely lead to further stages of the attack, such as downloading additional malware or redirecting to phishing sites.

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 https://tipitesovowufe.weebly.com/uploads/1/3/0/5/130545745/5725602.pdf
    • http://ahoconline.com/uploads/1/3/0/5/130551008/wokuzu.pdf
    • http://porschasdivinediamonds.com/uploads/1/3/0/5/130543028/tunogota.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/4/130436415/130436415.html#for+the+beam+and+loading+shown+%28a%29+draw+the+shear+and+bending-moment+diagrams+chegg

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fec.bin
ad1742972bdaa386b7b3d9384e9cbdb1a43c0a2fc8f7196819c2601dc1f7805e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC 8096 bytes
font_01_sfnt_off00003913.bin
d643e94e9aad72833ab255fdfe6ac5c81b57e62085ac58574589be94f4520616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3913 16796 bytes

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