Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d75c0a88b11f910…

MALICIOUS

PDF

44.3 KB Created: 2020-11-03 10:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 852d30ae02016b0b57b8cc15df9fd21a SHA-1: e69db3184da7dc84f51a2bb31cf7c3f5efe8903f SHA-256: 2d75c0a88b11f910aa8a18964cc398b2de2dd6983033c87c4c58ccfef7d5e1bc
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. One of the primary links, 'https://gettraff.ru/aws?keyword=swamp+of+sorrows+horde+flight+path+classic', is flagged as malicious. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests an attempt to drive traffic or distribute further malicious content, aligning with spearphishing attachment tactics.

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://gettraff.ru/aws?keyword=swamp+of+sorrows+horde+flight+path+classic
    • https://cdn-cms.f-static.net/uploads/4426063/normal_5f9da793a3b8d.pdf
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5f9e1423bc4e6.pdf
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f88351dd36c0.pdf
    • https://cdn-cms.f-static.net/uploads/4414491/normal_5f9b892e5d7f3.pdf
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f8d0f07348e2.pdf
    • https://cdn-cms.f-static.net/uploads/4426063/normal_5f9c0d401f2b1.pdf
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f9e242f42d98.pdf
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f8e15b0e4c2a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0505/5509/3177/files/tableaux_de_provence_piano.pdf
    • https://cdn.shopify.com/s/files/1/0491/9151/8374/files/85047403391.pdf
    • https://uploads.strikinglycdn.com/files/aca29ae3-ba57-4b38-83bf-c4ece488feeb/55851998934.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_off00006d5c.bin
96e65b0b5e706737b4d8f614a455f8230eaf0e66c0d34cc0f4134331f88ce93a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5C 5764 bytes
font_01_sfnt_off000080f1.bin
eeceb79ec42669ed08fe6973dd97732ccd1c472eac6d003099e51fe0859186a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F1 10368 bytes