Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c83f513d305d87…

MALICIOUS

PDF

43.2 KB Authoring application: OpenOffice Draw
MD5: 8aefffe4a78137deb5cd1302c9b8f1ea SHA-1: 50190c5b718d93aa3740605abcc2b1fd0a7cbe9c SHA-256: c9c83f513d305d87ab007b16feb8ec6da67df77243ccbc980ef575c7046ca45b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious classification. The document body contains seemingly random text mixed with URLs, suggesting a lure or obfuscation technique. The primary attack pattern involves directing users to a network of linked PDF files, likely for SEO spam or to distribute further malware.

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://abra-maquillos.com/uploads/1/3/0/6/130604815/399c1e6a4.pdf
    • https://ridodiwoweno.weebly.com/uploads/1/3/0/5/130542940/5152610.pdf
    • http://jaradanof.desarrollo365.com/uploads/2020/01/27/warakidadefo.pdf
    • https://tuwenugajas.weebly.com/uploads/1/3/0/2/130271077/5d182cf2da5933e.pdf
    • http://kofaborog.trokot-official.pro/uploads/2020/01/29/7298836.pdf
    • http://bigcreekcatering.com/uploads/1/3/0/3/130323160/4026788.pdf
    • http://musicinmyneighborhood.com/uploads/1/3/0/6/130604566/daforugugituvatumobu.pdf
    • https://nomilivof.weebly.com/uploads/1/3/0/2/130287537/minusuditeromi.pdf
    • http://thehanger243.com/uploads/1/3/0/5/130588276/kedegesu-wugalovi-vegoxivufi.pdf
    • http://blindsquirrelcreativedesign.com/uploads/1/3/0/6/130621619/1371039.pdf
    • http://dontdate-her.com/uploads/1/3/0/5/130545742/nilazin.pdf
    • http://jenitacargo.com/uploads/1/3/0/2/130287289/gimirikebesesuwolov.pdf
    • http://bethelmoms33.com/uploads/1/3/0/4/130488851/6174241.pdf
    • http://drpatty.net/uploads/1/3/0/5/130542773/130542773.html#krispy+kreme+report+card+rewards

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001379.bin
c1ca548378a0fbe3eea5964a9954f48abb0cc6f853add75c8192aa964cab1d0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1379 8204 bytes
font_01_sfnt_off000060dd.bin
c7143368894299a997ed09f05024df052d964886bc902d598de4a6791c50751f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 10292 bytes

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