Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0591402989cc4ff…

MALICIOUS

PDF

61.5 KB Created: 2020-08-20 13:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a76595f70c462c008801751dfed8128e SHA-1: 9268e54331d884a3497deaf3f33d9bfad56bcd95 SHA-256: f0591402989cc4ff2f0a614f373e1be58b4af00754232727925bb5b77a70e611
150 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, specifically linking to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=adeptus+mechanicus+codex+pdf+vk, which is flagged as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute content through numerous external links, with the primary malicious link being the most concerning.

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.ru/pify?keyword=adeptus+mechanicus+codex+pdf+vk
    • http://files.nicolorae.com/uploads/1/3/1/4/131406369/xutapovewuzigota.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/grammar_rules_for_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/lariparurowexukal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/financial_accounting_standards_board.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/makalah_endometritis.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/tilekixozetoxitaf.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/revewusubuzokevi.pdf
    • https://cdn.shopify.com/s/files/1/0447/1436/0985/files/articulos_de_tanatologia_forense.pdf
    • https://cdn.shopify.com/s/files/1/0447/9470/8117/files/5097693932.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/daseludol.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/java_default_value.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/bank_of_america_merrill_lynch_fund_manager_survey_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/first_day_of_school_icebreakers.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_off0000a4b9.bin
f908d56c4a6520ddee4ce8136e818079f72f4bf9141ec265b800c369a540622f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B9 5448 bytes
font_01_sfnt_off0000b72d.bin
ea94e4bab996838eace26bd460562229667677efb5f575820758bef5474544e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB72D 16188 bytes

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