Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da0ea04e7e4d5b0…

MALICIOUS

PDF

43.5 KB Created: 2020-11-02 23:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c1499814a11d53cc1fd495e02e981ee5 SHA-1: 12c7eb80055730887288be8591cc04c44b7cd98f SHA-256: 5da0ea04e7e4d5b0c81fdaea92b67f93e7028e9f9a20d3049512eb97e085fda8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of numerous embedded links, many pointing to benign-looking but potentially deceptive content, further supports the attack pattern of luring users 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://gettraff.ru/strik?keyword=unit+5+sadlier+connect+level+b+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f95a89b53621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f8ca59ca6bc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5f9f2e7e4e7ec.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/c7e907fd-31ac-4357-9858-ab5476399f73/the_happiness_project_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4182/files/escudo_do_flamengo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/wujiwanenutitituxelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a83d1b-a451-4489-bbd0-e73879a12846/kotor_community_patch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fa04eb-1fbf-4f07-b44b-2a562848f1f8/92509972950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd963e85-0557-468d-ae8a-7d6308734331/wagesobifemosupewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a414595-9554-42da-9a55-ac17d33c185f/68140038463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43d31f6-371d-4f97-91a4-002db00a1fc0/borderlands_2_game_of_the_year_edition_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf775ecd-8dc5-4776-ade4-28e8d2d61ea5/74949605909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5767/5932/files/95604288672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0960/5273/files/layers_of_the_gastrointestinal_tract_wall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7488/6563/files/ap_human_geography_chapter_12_study_guide_key_issue_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03aa63e1-b470-434b-a728-fa22fa196a10/palamozawipiz.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_off000061cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 5296 bytes
SHA-256: 5f224ff32d7cb12c61924dde90f9c29788c9d354c687a09edd6fa5e586f940b3
font_01_sfnt_off000073f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F2 9024 bytes
SHA-256: 47dd47e6989a238ae311c1628942d77828797abb1b71ce8a7ff1af5a02cc4516
font_02_sfnt_off000092ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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