Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f9dbf1b34d4963…

MALICIOUS

PDF

63.9 KB Created: 2020-10-15 09:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: ed264632be28c248acef5168fcf6f167 SHA-1: 83031876a7c403eb7bf0679cdd867b638cc609ea SHA-256: a4f9dbf1b34d496360969d2036a5f23e1bf45c8ff917f27dc7c06a66a702541e
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/wb?keyword=gre%20gmat%20math%20workbook%20pdf In PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/gowonavigevezik.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/zefaxit.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/8fb3b.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/1576217.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/fozojige-fagejo.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f876e20b7854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8713364a927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f875d9114ed3.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000ba1b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000ba1b.bin)
    • https://uploads.strikinglycdn.com/files/02eea59a-f364-46c4-9d11-d273f5aa8dfc/zerikirusadepodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55714ab9-5f2a-4ecb-8f0d-f33edf322e0c/82867499984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c7eb64-cee0-4450-8959-068267a02d28/32060030692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5331133f-a53f-4d78-bd62-c83d6562208b/ninuzosekuvokododu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9949d8-17cd-4d45-a73c-c012b495d4d6/jovulasus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1216633-30cb-4bd0-871b-5a406a144864/sarelid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38580841-fff7-4bf2-8643-8da2f953a06d/77387026682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb7a2ca-d20f-46e2-b04d-6e38550cd555/5808554082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/fundamentals_of_the_faith_teachers_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5135/9642/files/10054799123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4037/3398/files/40740446997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4075/7654/files/cross_platform_games_ipad_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/53211084510.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 extracted file (font_00_sfnt_off0000ba1b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1B 5572 bytes
SHA-256: 9d8f37f233f7f9e60c3703bd221bbbe8883da716d418ddaae981c69cb166eaec
font_01_sfnt_off0000cd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD04 10940 bytes
SHA-256: a3dcfb847afb43dc6438c64ce1729fd963a7c77cdb3ddee9c337822b3e94675a