Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af768f8c033bd2b…

MALICIOUS

PDF

44.7 KB Created: 2020-10-05 06:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: f858d32ceb289e16ddad0e6a30678eb2 SHA-1: fe2ccefe16ddfd7c3d7e378803a1afafe3454374 SHA-256: 4af768f8c033bd2bf75d7666c3571ca6fd3a0744df00f79d38b3aed7f3d04436
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=azpen+tablet+review In PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/fufanijilom.pdfIn PDF document text
    • https://site-1038363.mozfiles.com/files/1038363/58656681868.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/sogolafuxagunije.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/037a24d6-0f0e-45d7-be2c-0f68fa15cf99/xudijemila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548ff837-7a8f-43c9-ab67-3b5a097897bc/nemezefomat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892eceef-15ac-4f6e-bd70-03579d78702e/joxovozamub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2727/9267/files/tri_tronics_classic_70_g2_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/define_the_word_investigative_journalism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/half_blood_prince_potion_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2321/8341/files/the_illustrated_waltons_episode_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/3402/2566/files/21340368094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/75404656067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2357/8774/files/xunoxogobokow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/alone_in_the_madness_2_soundtrack.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_off000072e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E0 4968 bytes
SHA-256: 2d7341c9b3e7b97c5cdf050f1eb8efc541b2ac44d445ba76cec7bc791f9a7537
font_01_sfnt_off000083ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EF 10008 bytes
SHA-256: 0a798338fa17dd42c157ec19e840d2697df82c2162fb4a72f32b2352e53e2882

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