Malicious PDF — malware analysis report

Static analysis result for SHA-256 c739140d3b61b3f5…

MALICIOUS

PDF

35.0 KB Authoring application: LibreOffice
MD5: 8774cba8b325146079028569d00f6749 SHA-1: 9565dc5825929e08958deb97ffbfa5dac747ae1e SHA-256: c739140d3b61b3f562a251036cbed92eecc716e921c2327de5ed70cf8ce16fdc
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm or redirection strategy. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body, though heavily obfuscated, contains references to these URLs, reinforcing the attack pattern.

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://notaria88qroo.com/uploads/1/3/0/5/130551135/8fc4cd6dc8b6f9.pdf
    • http://gaketo.nikulin-ildar.ru/uploads/2020/01/29/9db78a1085760.pdf
    • http://michaelazoe.com/uploads/1/3/0/2/130270747/1648328.pdf
    • http://iqrender.ru/uploads/2020/01/28/471ce.pdf
    • http://365poolspa.com/uploads/1/3/0/2/130289551/wozikikunesisagox.pdf
    • http://ulmtal.weebly.com/uploads/1/3/0/5/130588633/aa59bfc3.pdf
    • http://northwestuu.com/uploads/1/3/0/6/130620632/130620632.html#second+law+of+thermodynamics+at+stopping+times

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010df.bin
7d5ac7dee97c36344777096d460af9963d01cfc33d8d2e3ab0020b8fa247388b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF 7784 bytes

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