Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32b29c870b34583…

MALICIOUS

PDF

54.0 KB Authoring application: QPDF
MD5: d8f3bd59e99b012e1bc43d447fc4f2e1 SHA-1: 98d94fb872ce65e2668a70f3bc538c4a5f085ff8 SHA-256: c32b29c870b34583b73a24c46664ea2cc48df831e80abf13306753bdf3e5bcdd
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. ClamAV also detected this as Pdf.Phishing.TtraffRobotInstall-7605656-0, indicating a phishing or traffic redirection purpose. The ML classifier strongly agrees with the malicious verdict. The embedded URLs are the primary IOCs, suggesting a campaign focused on redirecting users to potentially malicious 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 http://shoalcreekinteriors.com/uploads/1/3/0/2/130291922/besuxadabobebog.pdf
    • http://dpjutzi.com/uploads/1/3/0/2/130271240/dujipu.pdf
    • http://mmjplantation.org/uploads/1/3/0/5/130541064/zapiluzutir.pdf
    • http://luckofseven.net/uploads/1/3/0/7/130738765/tirisoduj.pdf
    • http://a1412531xstreamtravel.xsideas.com/uploads/1/3/0/4/130435649/130435649.html#qualitative+research+journal+author+guidelines

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001024.bin
17ce1acb0a83cf688ed58a9af5dbd49f7f14d9bb1a8f449b7764d942c69e3c39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1024 8164 bytes
font_01_sfnt_off00008d68.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D68 16204 bytes

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