Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ffcaf97c1130e4…

MALICIOUS

PDF

46.9 KB Authoring application: Adobe PDF Library 9.0
MD5: cb4305c4d23e2b513a7accbb0d1a297e SHA-1: 152756ffc820c84545efb74339fa1e612597ea8f SHA-256: d7ffcaf97c1130e49bb620afdbe21ed52bdd63bcc3c9c8d586cbc2b8ce955f7c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm pointing to numerous external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise, likely serving as download or redirection points.

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://purevoyage.net/uploads/1/3/0/6/130620622/wokibefosogubi.pdf
    • http://100places.de/uploads/1/3/0/5/130551311/ba1d96.pdf
    • http://guru.hello-news.ru/uploads/2020/01/28/xomusidibagupizez.pdf
    • http://buysanfordrealestate.com/uploads/1/3/0/6/130621248/najotek.pdf
    • http://trinitykalispell.com/uploads/1/3/0/3/130324315/zuribobepufejatuzope.pdf
    • http://paradigmcreativeworks.com/uploads/1/3/0/3/130323535/a882714ef6c.pdf
    • http://nickmartine.com/uploads/1/3/0/6/130604613/levanumutiwod_fotam_wodibosidoda.pdf
    • http://multistreams.com/uploads/1/3/0/7/130738512/130738512.html#tozer+mystery+of+the+holy+spirit

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c7.bin
3c9791b42fe2217ffef1046e16f290ced4c23484402c399a100548bfb6990967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7 8808 bytes
font_01_sfnt_off00006746.bin
129d179cbdb832d6839cde7c483d6c76d4a2997b1a2f76d4ceb05709c55f3460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6746 13580 bytes

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