Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4da1867bee8efb…

MALICIOUS

PDF

44.9 KB Authoring application: QPDF
MD5: 5ce4d17060bcfd65961898ef2c5ded18 SHA-1: 42b8954c0eb6808683ffe7611989a4445513f665 SHA-256: ec4da1867bee8efb3d75666d494f6ef231f38beb35d21eb2fb96e7aa95d89661
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body text, while partially obfuscated, mentions sending emails with cover letters and resumes, suggesting a social engineering pretext. The embedded URLs likely lead to further malicious content, as indicated by the ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0'.

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://ahstigerband.org/uploads/1/3/0/5/130588145/6859784.pdf
    • http://thinkhappyvibehappy.com/uploads/1/3/0/6/130620808/ratuzekuminetezop.pdf
    • http://motion-sickness.com.au/uploads/1/3/0/4/130483957/4937566.pdf
    • http://beachhousemedia.us/uploads/1/3/0/5/130551124/fc99e291677f15.pdf
    • http://anniemaegreen.com/uploads/1/3/0/6/130620823/buwopunogipepinim.pdf
    • http://sauerlandhypotheek.nl/uploads/1/3/0/3/130313117/130313117.html#sending+email+with+cover+letter+and+resume

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010fb.bin
0d0d0108ce2646c8d904aff0dce3d00acac410095d701e90ddecd35929b6d5d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB 8628 bytes
font_01_sfnt_off00006929.bin
32bdc4d24c5e1411dff6a7cb0e11b4db57f258f5f1aebd915c07bb0c4fe5be7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 16160 bytes

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