Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7b8241a4b5603a…

MALICIOUS

PDF

45.7 KB Created: 2020-10-16 05:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 8381bbba17d90e65831a69ec5cee2b3c SHA-1: 0aa84125cf8c981b6f3d35ec7cd2d2f2619cd724 SHA-256: cd7b8241a4b5603a33f26fdc49750c083da371052f13e6a011f64c06efb60627
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://ggtraff.ru/strik?keyword=virtualbox+android+wifi+problem In PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/9668666.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/wijifazave_ramerebuga_jokuxewagixeru_zinuti.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ralas-tapupav.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/timoredonazesar-gubelek.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/sudamoraz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f873e7327451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f88921252de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f8909357b431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f875a9416153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f87daaeb2358.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/1/0499/2463/6823/files/gulbarga_university_b.com_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7598/6116/files/handbook_of_condensation_thermoplastic_elastomers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8386/5506/files/85276967005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3881/0023/files/new_balance_990v3_jjjjound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dde32dd-646b-44a1-951d-beba19abdbfa/zovamabutidotuxebakitipig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2aa02ec-2ba4-46b8-b1cf-f94d2861a86b/fadipawera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e86331c-a169-466b-aea5-d12220da5bc4/vivesivazoligatixebamifeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ec1e3a-801d-4a05-89b2-4275081f3124/gutabefafufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a8e26f-a102-451c-875a-4447960eda4d/reradafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65312354-62be-427f-abb5-8167885b68d1/dagafedopewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f98fa60-58ca-4fac-8643-f3a9552f6d7d/gowozirigelesijakegazuveg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b87604-01c3-4ca2-8922-fdcbda338daf/94407161313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/concave_lens_ray_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8890/6902/files/redorebadaroluxesezoje.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_off00007215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 5276 bytes
SHA-256: cf87931a018fc08c315d3b0d96f598b367a519db8c26e78239a37419991f8fd2
font_01_sfnt_off00008403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8403 10916 bytes
SHA-256: 0cbaf4a4303dec0a9e52e98fc797f64baa8c9f15bff9b0c9128913fb68e99746