Malicious PDF — malware analysis report

Static analysis result for SHA-256 86da7055077b2a4a…

MALICIOUS

PDF

44.5 KB Created: 2020-11-07 21:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bb4d290ad4316b081213edeb93f1df87 SHA-1: dbd58bc6c652d90eb26dff8d42a3550fb9ca218f SHA-256: 86da7055077b2a4a37e506933d821e23c243b87acc2ffd53acdc23c50ece20cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://traffine.ru/aws?keyword=tramontina+induction+cooktop+user+manual'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious sites. The presence of numerous links and the identified malicious redirector indicate a link farm or redirection attack pattern.

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://traffine.ru/aws?keyword=tramontina+induction+cooktop+user+manual In PDF document text
    • https://jijalasigode.weebly.com/uploads/1/3/4/3/134344414/sexoj.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/kowitet-zitegisuja-robop-juzutug.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/9616235.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/nibugolud.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/tudab-xulegig-palosupojufer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9324ae57-f845-4e2e-aed5-17f560ba72a9/pelewijureberabotivenu.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/assignment_in_spanish_means.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/quote_slow_is_smooth_and_smooth_is_fast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e5971a-b81f-4f7c-9730-a742f8e82412/52739815191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b903c3d2-54b8-4e09-bf6e-b6e9708b30eb/saziremotetipomelegafupa.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/xutuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/fender_starcaster_electric_guitar_cxs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 5116 bytes
SHA-256: 0787c0a1636de915daf7f691f4482c3e00ffccc55dcfbb403b70e7ea353af2d7
font_01_sfnt_off00007192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7192 10704 bytes
SHA-256: 749597e3a916451f85d13a104d018767ac2d8071606b907c2aadc7d503979ed9
font_02_sfnt_off0000957c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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