Malicious PDF — malware analysis report

Static analysis result for SHA-256 035157c5f51fc834…

MALICIOUS

PDF

39.1 KB Authoring application: Pdftk
MD5: de94223762b8418502e1dd9a9e719a4a SHA-1: c75eadf4e73a5db9bf55ffda3877f71210da4fd3 SHA-256: 035157c5f51fc834c5cf3e6cf5efec7d02773916ef4d281ff63796cf2032a4a4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious content. ClamAV identified the file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a critical heuristic detected a PDF link farm. The embedded URLs suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lodenajuv.nolimit.fun/uploads/2020/01/28/d05355595d047ff.pdf
    • http://ciarawiegers.com/uploads/1/3/0/4/130435702/2191967.pdf
    • http://nosceteipsum.co.uk/uploads/1/3/0/3/130313271/mugapive.pdf
    • http://upfrontadds.com/uploads/1/3/0/4/130490181/suxil.pdf
    • https://modurunedad.weebly.com/uploads/1/3/0/5/130551556/09ffe1c77f0f9e7.pdf
    • http://mytranstrainer.com/uploads/1/3/0/6/130605094/jazolemixudanit.pdf
    • http://mrmacbiblebook2.com/uploads/1/3/0/3/130323400/130323400.html#create+a+signup+sheet+in+google+docs
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010b9.bin
6347781456598d322ff74ceaffa1fb4827a3c8983ab11177fe4b63f243f07b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9 7792 bytes
font_01_sfnt_off0000526e.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526E 16036 bytes

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