Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9f237bb5be1d38…

MALICIOUS

PDF

42.5 KB Authoring application: PDFedit
MD5: 5766c32149d2b54e69d48a60e7f20c14 SHA-1: ed0169f512605f230e8f3759fb3544c1c2ec3919 SHA-256: 9d9f237bb5be1d38ffaa6c0cb97e4b057d303c84f6ef17ee2eb437c51e17fca6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique commonly used to distribute malicious content or conduct phishing attacks. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, pointing to multiple external PDF files. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports the malicious intent. The embedded URLs are the primary indicators of compromise, likely leading to further stages of an attack.

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://mikaren.com/uploads/1/3/0/3/130323884/juzojobidumuzilezu.pdf
    • http://barknbees.weebly.com/uploads/1/3/0/4/130483863/dolisejew_roxupata.pdf
    • https://zemuzegubovuje.weebly.com/uploads/1/3/0/2/130287533/fabfb7a8557.pdf
    • http://dustbuster.us/uploads/1/3/0/6/130639518/60884f9c.pdf
    • http://rar.biohimchistka.ru/uploads/2020/01/28/84d81aa4f.pdf
    • http://hopealivemin.org/uploads/1/3/0/2/130272356/6303762.pdf
    • http://asociacionperiodistaspr.org/uploads/1/3/0/2/130270740/130270740.html#deep+neural+network+hyperparameter+optimization+with+genetic+algorithms

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e0.bin
f73bf1bec593517433d51a67e2191d1cf06526aa2dee2f0b20d29db10f606195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0 9636 bytes
font_01_sfnt_off000069d1.bin
a7b380f8669ccaf774a2d0ddfd1220fec2c0d61347b1922e82944a15d43b66b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D1 3064 bytes

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