Malicious PDF — malware analysis report

Static analysis result for SHA-256 19131cc3cff18a8a…

MALICIOUS

PDF

49.1 KB Authoring application: LibreOffice Draw
MD5: 6abcc268104a9776a96553165e2c862b SHA-1: 255968beb65a438a64e2b8f6f25ce39843e69d4c SHA-256: 19131cc3cff18a8aac1eecf21460070c7a2328a327c09fce8c9c2899c136ff83
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and an ML classifier also flagged it as malicious. The embedded URLs are the primary IOCs, suggesting a campaign focused on redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://samuel.world/uploads/1/3/0/5/130542922/punitufeli-gazeze-bubuzuk-juliname.pdf
    • http://vikupavto82.com/uploads/2020/01/28/63d46afe13e3e.pdf
    • https://zedabazomu.weebly.com/uploads/1/3/0/2/130272649/pikelugote.pdf
    • http://sightlux.info/uploads/1/3/0/4/130476505/f7966b0cd457.pdf
    • http://aledger.net/uploads/1/3/0/2/130288333/6ebe0e739.pdf
    • http://andrewdpaterson.com/uploads/1/3/0/2/130287529/levamidivojalibu.pdf
    • http://newcoursecompliance.com/uploads/1/3/0/5/130540585/6613806.pdf
    • http://dalata.centrmebliv.com/uploads/2020/01/29/6046178.pdf
    • http://sozitopo.windowsx64.ru/uploads/2020/01/28/e5d384d1.pdf
    • http://winchesterartmurals.com/uploads/1/3/0/5/130589144/d2e6aac49cce.pdf
    • http://drpatty.net/uploads/1/3/0/5/130539922/130539922.html#informacion+de+artigas+departamento
    • 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_off00001498.bin
ebba2d981b44ddee5dc246cafd18abeb0d5bfcec12d9e9d2f86924757fee8ef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1498 9980 bytes
font_01_sfnt_off00007908.bin
cd89342889a93d2ffab308b56497ca428f6da6aa1bdd0ead2c56f82924e74970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7908 16268 bytes

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