Malicious PDF — malware analysis report

Static analysis result for SHA-256 b525117e38c8a617…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 09:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 781a3fad2b498f1a1b93193013b8f9bf SHA-1: 7d47654769e8f86ff6678689c9f38a58605fe01b SHA-256: b525117e38c8a6178bfdfc0f3baf8b12d969ef8dd399b6afa757034ce950c3e8
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination. The document body itself is heavily obfuscated and contains the malicious URL, suggesting the primary purpose is to trick users into clicking through to a malicious site.

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=ototoxicidad+por+medicamentos+pdf
    • http://files.photographybyjohnholliger.net/uploads/1/3/0/7/130775432/d8c1da8dfbc666.pdf
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdf
    • http://mirafut.theimaginariumnh.com/uploads/1/3/0/7/130775795/bazovixu.pdf
    • http://files.cybersecurityinc.net/uploads/1/3/2/6/132681938/natuwafegaga.pdf
    • http://files.centralparkwaysites.com/uploads/1/3/1/4/131454355/ladisikumawukotorazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/wuvan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/fojifalozijaneterik.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/mcdonalds_collectibles_price_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/68301264620.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/raxudurimetelaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/gozitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/19803254500.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/29437718916.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/xutabetuwadinomanekupeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/convert_to_fillable_form_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/tipo_de_investigacion_cualitativa_descriptiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/rakojobak.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_off0000666a.bin
36cf211e8697955d7a912227e69cb2267a03536849ca32ac74c09c1d926e1ae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x666A 5364 bytes
font_01_sfnt_off00007897.bin
03f242ea28b2fd330ad11cb2f5e3d21f910b8046e0ea28bcdc3cd562cd684cec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 10884 bytes