Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadef591a09f051b…

MALICIOUS

PDF

45.0 KB Created: 2020-10-20 09:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c5154adec55098545525af5444c6967c SHA-1: fdf396ce43a0e2e6ebf694f75c4b89f7e4dddf8f SHA-256: aadef591a09f051b20be5d96a319d955abbd3b116d35a48d58c7ed745b89af36
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://cctraff.ru/123?keyword=measurement+system+analysis+procedure+pdf In PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/zewoni-sonasubudo.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/bodepoxuzuzuwoliw.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/bofajifolapumalij.pdfIn PDF document text
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/186a44b52.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/kimirexenu-nowawu-kuwuzaripebizuv-gipofode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f8aa1d304e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5f8d58c4e9713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8722240bfc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f88b0a891803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f86f977b240f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8836aa91d35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4eeefe5-a9d2-458d-aebf-a520e96ae148/85017452805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5936f730-1162-40db-9ef4-9f6147d68c9b/8189348659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b2dce5d-e799-4042-af4e-826305338250/43203270136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0cd874b-08e9-442c-b8dd-f57bd4566b0b/kipigogamuvoxigatolam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5b2c4c-1425-4ddd-b634-8ab1f2305579/jixekupobezimuraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/monster_rancher_2_combining_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/security_council_resolution_1973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec501f6b-5e35-47e6-91e2-74355934ff97/sustaining_the_earth_11th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6610b288-29d8-4703-abd9-82814b0178cb/41708315794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbfd241-638f-4161-ad65-6d763e166983/91594406494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c53cfaf3-0375-4236-aa3a-0ab849597fbc/93057493446.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_off00006b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 5408 bytes
SHA-256: 70176a3cefe9dc19ea2c077be6a5b0d27bbea58bdbdaf0ba72d831bb9f231fb5
font_01_sfnt_off00007d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D73 12936 bytes
SHA-256: e027204d79fced3eb01f066a41684a1273cc38f515f4165899c52dd67f005d35

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