Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd24c5dad72cf7eb…

MALICIOUS

PDF

38.9 KB Created: 2020-08-17 17:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6c81966d2cc746786b2877c93b2c1a2 SHA-1: 9b68e9b11edb39de480ceb63ecdb69fb98b0a95e SHA-256: cd24c5dad72cf7ebbb6bfeaec04613d6f3c33f9c76a1a5da35f6a2cba61885ca
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests the document is part of a link farm designed to lure users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting further analysis of the payload.

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=nutritional+information+three+bean+salad
    • http://files.scenerychanges.com/uploads/1/3/0/9/130969220/jinogemimixumu.pdf
    • http://files.hopeshouseworks.ca/uploads/1/3/0/8/130874585/pexekasaveb-vekurud.pdf
    • http://kekufori.mrsvaughnwebsite.com/uploads/1/3/1/3/131398504/fasolukuselelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/63822654568.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/super_deep_throat_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1369814796.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/country_dial_codes_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/craft_inc_business_planner.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/43989311805.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/bivamilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/gijuxejinobaduruneb.pdf
    • https://cdn.shopify.com/s/files/1/0435/0119/1328/files/magyk_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/82860543675.pdf
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/4_h_cloverbuds_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/89982211606.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_off00005a6d.bin
5d4df44afca6e557530acb195699f939654ec3ead1ff322abe8f80c0c9e37309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6D 5256 bytes
font_01_sfnt_off00006c18.bin
061a84a5bb136347f22930cb2e1a4429f122bf397e189daaf025bc227813bfed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C18 10032 bytes

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