Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adbba6cb11ff1fc…

MALICIOUS

PDF

45.4 KB Created: 2020-08-23 16:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85ad1ddaa2374e26e91a9452db907231 SHA-1: 4e6062e8bcfad2642767ad55373305b4b4e36050 SHA-256: 5adbba6cb11ff1fc871965c8a69bc5c52e4c058214879062aaf4f508eb9d46e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links but some are suspicious. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring users to click a link that ultimately leads to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=born+a+crime+pdf+free
    • http://roxanon.clintonpottery.com/uploads/1/3/1/4/131406086/1084104.pdf
    • http://files.whatevergoestv.com/uploads/1/3/1/1/131164351/020ff9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/9264/5790/files/parepejuxejosimiwusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/rinawu.pdf
    • https://cdn.shopify.com/s/files/1/0462/6622/0695/files/dovufikidetunobikiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/linux_commands_for_networking.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/ibm_vision_statements.pdf
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/benim_hocam_ders_notlar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/sejovawozat.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/94313483251.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4081/files/14729875592.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005853.bin
c61754ec4c1f2f7d7cc0c5664e99763363b8b48166313378383f5233b846ba18
pdf-font-stream PDF embedded font (sfnt) at offset 0x5853 4848 bytes
font_01_sfnt_off000068a7.bin
07c2abe5ca684578f0b88836ac19449b72a84467f1fb75136c46f4febbbd9caf
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A7 17272 bytes
font_02_sfnt_off00009991.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9991 4324 bytes