Malicious PDF — malware analysis report

Static analysis result for SHA-256 af257e682b14f5c4…

MALICIOUS

PDF

71.5 KB Created: 2020-10-28 05:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: e3af52f08ad16f8607587a69e8d1cde9 SHA-1: c76f9b7b054acda0165209da60cd26fe5b7ba23e SHA-256: af257e682b14f5c424d79f60172a9ae7213bfe813c5feaa53bfb51f69b1a332c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=realidades+1+capitulo+2a+answers+page+63 In PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/a5e1ec36.pdfIn PDF document text
    • https://jumabesabixoduz.weebly.com/uploads/1/3/4/3/134368642/1fa3ecde8385428.pdfIn PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/wavijofi_pexorim.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/lojetatosebusunora.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f9308f620976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5f8eaf91de110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_5f96fccbe01d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f95452d274dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_5f94def6e5611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f8e2ce13c58a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_5f90099cbbeb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f88fdbd17d80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_5f92dd3be0b20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f8c665322bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f89d5c1bd70d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f9127fe70765.pdfIn PDF document text
    • http://www.opentle.orgIn 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/79bd797f-c202-4aaa-a092-c2e3fabedf16/94940213605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d7f3e7-7036-4b37-a78a-11fe1080d409/masatu.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/ap_intermediate_botany_practical_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/28438503919.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/perfect_shadow_brent_weeks.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/edit_text_in_illustrator.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/hr_business_partner_job_description.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b155.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB155 15640 bytes
SHA-256: bfee959660e2b66d913a26ae8186bbd82ad8d7b18b51e097cbcb510d6f5f1ab7
font_00_sfnt_off00009dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC2 5724 bytes
SHA-256: 97fcb80a13c2bff66a8d414b7e5afce5829a831e2cd5c0e3ef8704e19682c191
font_02_sfnt_off0000dc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1F 11000 bytes
SHA-256: 53c48476a1ae611465b750ee9d0d995e590fc6207b5bc67664e6e5bc99bf5a63
font_03_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378