Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6b469e946b653d…

MALICIOUS

PDF

57.7 KB Created: 2020-08-23 20:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed7d4e7cdac6b3e87492a7b7463e7f70 SHA-1: 0d347d328d27eeb8e22cc2970b65b3f3216d5e39 SHA-256: be6b469e946b653d3bda79339f1cb22ee55601b50bd9ed73ed26e4037401ac26
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=ncaa+basketball+uniforms+2018'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ncaa+basketball+uniforms+2018
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.pdf
    • http://files.poeticp.com/uploads/1/3/1/4/131438459/guladexe_pamubopopugapi_ruxudapixeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/tawibikovegasez.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/mechanical_engineering_interview_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/56819336656.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/roblox_shirt_template_psd.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/47475039241.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/tefoxalomidogovirofuwi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/55872270057.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/43395018877.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/xibarifukawos.pdf
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/76845744321.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096cb.bin
2367c0f04bd5afc6db6dc1e7c8f92e9ccc1edc36122c6313cfc08f2e5b73ccd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x96CB 5604 bytes
font_01_sfnt_off0000a9c0.bin
200762bf6e18ccaa6e37697e7879ec5736bd4757e0a0ed93c1853cb61ec3e394
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C0 10012 bytes
font_02_sfnt_off0000cc02.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC02 4324 bytes