Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61218f65a1baab6…

MALICIOUS

PDF

40.6 KB Created: 2020-08-14 15:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a17f4dd2bbce374819161d1eccfe21fe SHA-1: 2f26c5c234580c2520226c2ddc8abcc182de91e8 SHA-256: c61218f65a1baab6837eb700a20c4a55356ba7a51ee443c83c17fbc8997dfb60
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com) and appear to be part of an SEO link farm. The document body, though heavily obfuscated, contains the string 'Mens haircut headsheet' and the malicious redirector URL. This suggests a phishing or scam attempt designed to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.com/pify?keyword=mens+haircut+headsheet
    • http://tabew.newbedfordtattoocompany.com/uploads/1/3/1/4/131454065/f4ded9e85531d98.pdf
    • http://files.alpineathleticchamp.com/uploads/1/3/1/1/131164250/3279373.pdf
    • http://files.nickellabradors.com/uploads/1/3/1/4/131454850/cfd840538897474.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/xuxugiluziwuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/xoviramevulapemuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/alter_ego_plus_c1.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/gajanupuzuroxukiganogub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26160609228.pdf
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/soneviletemul.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/the_rocking_horse_winner_summary.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/83199867399.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/vogifazisofejosina.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/cs_lewis_cristianismo_puro_e_simples.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c0.bin
352de1f70ef92680b5cfbf977657b04dfbc1a4eb1ab21fa3103e3c3ad65ac6c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 5000 bytes
font_01_sfnt_off000073b6.bin
c19c25d9438c00e8fbd02df5b4c446cb2ff371a57a1dbada81be7af8cd2d2c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B6 10024 bytes

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