Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58497a7e98f7c23…

MALICIOUS

PDF

31.2 KB Authoring application: QPDF
MD5: b92434c2b1fc058ea545e14339399b17 SHA-1: df0c627567ccf72f8261864effb9fdc74df4b614 SHA-256: c58497a7e98f7c235bc1faccc505f9bf985eb495679b965b4485959f6b6dbdbd
170 Risk Score

Malware Insights

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

The critical heuristic 'PDF_SEO_LINK_FARM' indicates the PDF contains a large number of external links, suggesting a lure for users to click through to malicious sites. The 'PDF_URI_IP_LITERAL' heuristic further supports this by showing a direct IP address link. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' confirms the malicious nature. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://poneroxeko.bosh.moscow/uploads/2020/01/28/e966582055.pdf
    • http://kylestevenanderson.com/uploads/1/3/0/6/130603943/5106218.pdf
    • http://polishedpad.com/uploads/1/3/0/6/130639107/c4f746d1ffe5.pdf
    • http://crosshopefellowship.org/uploads/1/3/0/6/130639139/palojizuridagoza.pdf
    • http://hearchrisvosters.com/uploads/1/3/0/6/130604417/pumodawi-rumugomufad.pdf
    • http://jofip.infonetacademy.tech/uploads/2020/01/28/6490780.pdf
    • http://95.217.124.64/uploads/2020/01/27/c3d18b7268.pdf
    • http://amicoffeecompany.com/uploads/1/3/0/6/130605179/vajemidipin.pdf
    • http://mychinesewatch.com/uploads/1/3/0/4/130483266/130483266.html#blood+diamond+movie+hd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001131.bin
86bb7c6a48d27a8dd07a8bd723d6557e753cb1b3adc0deb3d4110470f7d45207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131 7596 bytes

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