Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdccf8c9fb7ea82…

MALICIOUS

PDF

40.8 KB Authoring application: QPDF
MD5: 53e2d34de158f1e71794d45067f50c74 SHA-1: 89c157d6274eae7ddd74ad2a9f4807fa00ebba85 SHA-256: 0fdccf8c9fb7ea8207c74fb868cc2fd551631c8349fe6900f5ee7649df6968db
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malware. ClamAV identified the file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or traffic redirection intent. The ML classifier also strongly flagged this as malicious. While no scripts were extracted, the sheer volume of external links suggests a malicious intent to redirect users to potentially harmful content.

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 https://buduzuxosot.weebly.com/uploads/1/3/0/4/130475925/petobemasoritom_tejesufepow_filofibugit_gokivukelazenu.pdf
    • http://shantural.com/uploads/1/3/0/2/130287529/962d875bc663a9.pdf
    • http://wexez.cozystuff.ru/uploads/2020/01/29/nekemid.pdf
    • http://welcomeneighborftsmith.com/uploads/1/3/0/6/130621950/xajelareroz.pdf
    • http://robsvirtualretirement.com/uploads/1/3/0/6/130604488/7952340.pdf
    • http://mychicagorides.com/uploads/1/3/0/4/130436365/betovudof-dufuwawemosewo-farugejapu.pdf
    • http://jmaisd.net/uploads/1/3/0/6/130621045/130621045.html#mini+clubman+buying+guide
    • 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_off0000112d.bin
0c7813afb965ee53225f36504b3b212cfd6961aca0b815807ed9426265219554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D 7936 bytes
font_01_sfnt_off00005856.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5856 16268 bytes

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