Malicious PDF — malware analysis report

Static analysis result for SHA-256 a611b6dd12bf19d6…

MALICIOUS

PDF

35.8 KB Created: 2020-10-25 18:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d6c6f90294201b443342cccdeb03a80b SHA-1: 6b9702fbb13a09250704bcbfbdde6e677c56a769 SHA-256: a611b6dd12bf19d6083705a83e365c80f84d886e90fd13ade6ccbe4c9c6b5627
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, ggtraff.ru, which is likely used to distribute further malicious content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a specific textbook search. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to drive traffic to malicious sites.

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://ggtraff.ru/wb?keyword=ests%20textbook%20of%20thoracic%20surgery%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_5f8b9378802bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f9119c7a7be4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8759ca3b919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f88abbb97616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f896e83da4d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f8a0fe6ef729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f8850542ec1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f903b67791d2.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/4adbe309.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/disuxidupiroviwom.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/57339ac2294ba4.pdfIn PDF document text
    • https://wusunipusu.weebly.com/uploads/1/3/4/3/134320006/tinutogupopalesufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f90c8d28007e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f872dcebeaa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416666/normal_5f956fd66e8ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_5f92a5f9472da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385613/normal_5f8d43ffe9a99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f95658a45cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_5f8f7fab86c3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413735/normal_5f958eae672f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8d523d4a5e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f8ef0a4e9ac6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8417/2449/files/54471285946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2911/4275/files/pharmaceutical_product_launch_plan_template.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3D 5716 bytes
SHA-256: 94b3566a094de79b8d0716717a5646b6a430a50374ebe1e4de349505b6587868
font_01_sfnt_off000061af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 9492 bytes
SHA-256: 98c907517acfb39c75484bda49e1411f4c0507bec2263f1a723f8f497e985b57

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