Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d5a0e0bb7e31fd…

MALICIOUS

PDF

46.9 KB Created: 2020-08-06 22:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c4c704fd62a399236b887089bffa64d SHA-1: 33f2ddd536e28e284a7000df9f28726571fc1102 SHA-256: 85d5a0e0bb7e31fd8b7560e873da536c7ec7d41c71a2034c615a8d7da1aec675
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains hosting other PDFs, a technique often used for SEO poisoning or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document but rather a container for malicious links.

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.cc/pify?keyword=absceso+tratamiento+pdf
    • http://noxemog.gopherstatefire.com/uploads/1/3/2/3/132302963/genirobesijosavobina.pdf
    • http://files.guadalupemed.com/uploads/1/3/1/1/131164120/takunivopusigo.pdf
    • http://files.suncitylibraryfriends.org/uploads/1/3/0/8/130874115/wafulapizawudek.pdf
    • http://files.grettawilson.com/uploads/1/3/1/4/131408954/7905468.pdf
    • http://files.denveralpineclub.com/uploads/1/3/0/9/130969446/6287509.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/82039157886.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/borudinajukafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/cathtrisme_cardiaque.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/rikot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/98376428177.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/fuvaxojupaxirekejol.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/mutodutesatovavazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/6929153647.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/18740034096.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/vafolugegezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/zilotesobopejanaxaf.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_off00006957.bin
9b4cfd8c940b3bff74bff08f309e3137adc2974859ce539b1e44590e1506e4a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5184 bytes
font_01_sfnt_off00007ac2.bin
e5a3a4633bb41312c921f8438fe8d6fb46eb29ca7fb33752f4baacde3caf0d5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC2 11472 bytes
font_02_sfnt_off00009f2f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2F 4324 bytes