Malicious PDF — malware analysis report

Static analysis result for SHA-256 0810fe8c6c9ddcd2…

MALICIOUS

PDF

112.4 KB Created: 2020-12-21 10:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dd7b1922b25df81872374ad98810d657 SHA-1: 55ab45ec1da790c08bd1175bbca90a74f8448e6d SHA-256: 0810fe8c6c9ddcd2c52feb3cb4863ce2be1c2d5b77966c1c7c909a7d056d3d84
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=design+and+analysis+of+experiments+9th+edition+free+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to benign content but likely serving as a distraction or part of a larger SEO manipulation scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=design+and+analysis+of+experiments+9th+edition+free+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5f9602f19319e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5fc5c1bbc96d9.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/madipozudo-guxivakeziv-wikigamik.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/c9396e29-5baa-4615-ae92-0613757db71f/mainstays_3_shelf_bookcase_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e391cb-b973-4a15-b6e9-171b4f55a291/65833224055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7216a6d-c709-4e85-9f12-9c70575d2f49/zopusofofuvakowekazuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66503472-6ae1-4f32-80c1-fb814e0c9804/8425362359.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9c111f6a41984851340/t/5fc3df59145a8629dc277b78/1606672219266/34042841514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a287ff-0954-4a99-840c-6f33ecd901bc/62528986613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3456a8d5-0fe0-400c-966a-199302c09f1c/nogepitudikukunitenudufes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4ba62f-3c1c-4683-b55d-180964ff0af2/17173481371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1d19dc-083c-4e7c-8444-2dfe31396299/bedisadadizovujiwipidut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f186bda9c57a97be6d6b/t/5fc299fc3c02f22b9d61bd91/1606588929243/pokezip.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000170d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x170D5 28464 bytes
SHA-256: 1cfe593e95c2c9ba797ad25517052fdb2d0a104d742739dfb2a853b910e75d6a
font_00_sfnt_off0001336b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336B 5568 bytes
SHA-256: 5aa0d5dd110e4f3eb5cd2ace1d7625c6010fe8af64e85f50af98a0418990ed38
font_01_sfnt_off0001463a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1463A 12580 bytes
SHA-256: 473e52e6834fbbd9cb91938f37ec42dc09d2430d3ac6d90b683b8752d8244abe
font_03_sfnt_off0001a617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A617 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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