Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b4f7fef1067bce…

MALICIOUS

PDF

40.5 KB Created: 2020-10-04 08:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: e26ff48e77160c808b07ceb6fc2bed51 SHA-1: 3f99e56349f2b79827e989efaaceb9f6568bd2b3 SHA-256: a8b4f7fef1067bcea2d733405177ded83cee957a3bef09591ce84e7a3e3a249c
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=fifty+shades+of+grey+songs In PDF document text
    • http://files.essenceofblissmassage.com/uploads/1/3/0/7/130739268/razurapiriro-wirakixawil.pdfIn PDF document text
    • http://liwisan.sifrew.com/uploads/1/3/1/4/131483214/nutaz.pdfIn PDF document text
    • http://files.touatvue.com/uploads/1/3/0/7/130775635/88725546faa96.pdfIn PDF document text
    • http://files.enakosovac.com/uploads/1/3/1/3/131398133/ddc6b0.pdfIn PDF document text
    • http://files.ohiowellnessspa.com/uploads/1/3/1/8/131871593/maluluvufi_konigereg_vojutazud_sogoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000060fa.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000060fa.bin)
    • https://uploads.strikinglycdn.com/files/dba9f1ee-baef-40e4-b6ff-a40b6d28fb69/pisujinawiguzebuzamij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd39a671-e0d8-4f52-b134-ad21e8d66423/55902501728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab75ffea-7c3e-49dc-9605-2bb3b79ef05c/84193702710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c599c3-fa68-4a15-9160-958716d464db/60023896524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7a9210-7fbc-465b-9a20-2bdc36d882d6/10163907080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef2aade-d96f-4809-9585-0a95af0fb58b/livivugopuwusekivusuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e68f1eb-91af-4371-af89-de24cd186b68/61038634058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d30470-0faa-419a-a826-38a2c0254913/86730527478.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_off000060fa.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FA 5196 bytes
SHA-256: 7c90971e4f4eeeec13ba190395e5ca366e554342545725bcfd6d3a06f3e91056
font_01_sfnt_off000072ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AE 10296 bytes
SHA-256: e3da7407500f08b0c37ddb3d176d1a7530abf964615980d41f246990f25ea452

Open this report in the interactive analyzer, or submit your own file for analysis.