Malicious PDF — malware analysis report

Static analysis result for SHA-256 a800b856085dc0a5…

MALICIOUS

PDF

45.8 KB Created: 2020-10-18 23:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9b20380ced4b21241cffc8f5c993b7a2 SHA-1: 5dc10e2913425e42dc0ba3ead60aa0889e0a4e11 SHA-256: a800b856085dc0a50714e7919fc5d7e9468177f430413bd9ad91801c466c0d26
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ttraff.me/123?keyword=sybex+ccna+study+guide+pdf In PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/894586.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/jibepare-vudaramuzi-refirezagulele.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/demajawugijudo_narasobabuson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f88687ff1f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8a77b9f387a.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/3f3244003.pdfIn PDF document text
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/novusudoxis.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/6202603.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/4056929.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/1/0437/6035/3429/files/44174335733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9545/7946/files/96231436165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/1984_troy_bilt_horse_tiller_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1930/0775/files/one_hundred_great_essays_5th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9470/2763/files/workshop_technology_machine_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e2dee0-e0ac-43fb-b1c4-0d21e4a6005a/nosufonese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64f0b12-67f3-4ed4-b339-c574732e2b61/34866472392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7e3627-0f4b-42e9-9bd3-431b67144488/26181552794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cdfbd49-a1e7-4237-8c8e-56aee1a68c34/88661272469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3997898-b0a7-4c1c-aef2-b2f7dc78a1b4/newederuvirowazuvawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5d6077-993e-459f-ba90-5ec0439037d4/tututepexosezapodiraru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9362a6ce-afcc-47be-b7da-6874369e7740/14483620811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf779c5c-f0e7-4e99-8161-c9befdc72bd2/69445217526.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_off00006c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 5608 bytes
SHA-256: 8371592e3924fca267cd72f9d193198efb6420bcdcc470a9dbe4e0243363ec06
font_01_sfnt_off00007f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4B 13684 bytes
SHA-256: 1269fe5dcac90b2b7c0e4f39d8837c1668a8e0328b0a522daa4d0903ebd7bfe6

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