Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe04d563b14cd75…

MALICIOUS

PDF

45.2 KB Created: 2020-08-13 21:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 020a85488c22fa2bb95b70bae7e60a8e SHA-1: 7f71bac8b22a428d0704ade2ce16a9e375edab4e SHA-256: 4fe04d563b14cd75ebe8da1e47adcf419016c2147de83b53d8de71db39fd84b4
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is further disguised by the document body text referencing 'cervical cancer journal articles pdf'. This indicates a phishing or scam attempt to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=cervical+cancer+journal+articles+pdf
    • http://savizawu.artworkbyrenee.com/uploads/1/3/0/7/130738720/9c6803b6.pdf
    • http://kasuxorev.soulblisshealingcentre.com/uploads/1/3/1/6/131606490/a669afcd28.pdf
    • http://vomaso.northriversideng.ca/uploads/1/3/0/9/130968984/3099290.pdf
    • http://files.lumenchristiart.com/uploads/1/3/0/7/130738917/ruledolofigikegutaxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/furoposefadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/fadof.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/82848425647.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/27213017005.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5398/files/sweatshop_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/abbot_s_leigh.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/lean_bulking_diet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/bidujulez.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/nelifepuvuxotagifekije.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/finibus_bonorum_et_malorum.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/80529443110.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_off000070a5.bin
e8812f71c889c9a33fdf87cb11fd9684d4aca2cdbc8f1a3a9d574128046af57a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A5 5188 bytes
font_01_sfnt_off0000825d.bin
2f2981c5915b4f00c9371044ddc7c5b4832f35e84001f4f071b1cea8679a682d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825D 11444 bytes

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