Malicious PDF — malware analysis report

Static analysis result for SHA-256 1689f21f55ce7fe2…

MALICIOUS

PDF

54.6 KB Created: 2020-09-09 07:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec3dca63644796659ceadfe832c32084 SHA-1: 0ca0dacde9c3b707cb4c584ecdece68e2a2f176d SHA-256: 1689f21f55ce7fe2aa89c8579a42c8638db528c86a7e1473cfe859624fca444f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as a game guide. The PDF also includes a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification indicate malicious intent.

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.club/wix?keyword=deus+ex+mankind+divided+guide+gamepressure
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3309/1496/files/xefoguverarosivuvipepuzel.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8720/files/business_administration_and_management_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/5094/1078/files/43303354614.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/lets_play_pathfinder_kingmaker.pdf
    • https://cdn.shopify.com/s/files/1/0457/5651/4460/files/devovosipedodazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/2839340190.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/jasimodosiwevexuver.pdf
    • https://static.usrfiles.com/ugd/cfa91a_592edb117a9f4703aff19d05a8300e9a.pdf
    • https://static.usrfiles.com/ugd/d2751c_ab5a8e26481045eaa5c164daae2f36e5.pdf
    • https://static.usrfiles.com/ugd/b222ea_f7720520e5244ec6a1bf244fb8b01397.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097a6.bin
2502382c4c06b770bb066f99f3ce452efcdad76c9a3b6415abb47198ce2d7989		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A6 5440 bytes
font_01_sfnt_off0000aa22.bin
836db68b78edc1e51c7fa98f614515ea3d9beaee25a9d61ef6de160d8db7ca01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA22 10348 bytes

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