Malicious PDF — malware analysis report

Static analysis result for SHA-256 af238cc43f9df6b0…

MALICIOUS

PDF

43.0 KB Created: 2020-11-07 06:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 91a4af8e7ee6e91353bd787433605ebe SHA-1: 1d822cd2403cfe3d8e71448ed1a63c211fd83fb8 SHA-256: af238cc43f9df6b0091392f87f08f327ac1b3f911030a1b8d4b3b1b438353968
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://gettraff.ru/123?keyword=towers+of+midnight+pdf+free In PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/5054843.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/66e10c053e20578.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/sizobawidopibamir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f8bb17bb2dc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f8dcf2da168d.pdfIn 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/e44c4334-77b1-4727-8359-322a23dafbc1/vuxasajeraposemekol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7df506-009a-4dd3-9296-f7b043c5f700/bonew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c554e76f-1571-4ba4-93ed-28a7a2fa08b3/35889224667.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/chromatography_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348dd9f6-e566-4a18-a1c6-db37c0a58d4b/love_island_season_5_episode_31.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/osrs_clue_scroll_guide_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6291e3-9d1e-42a0-86a5-1bb051958b46/escape_the_prison_unblocked_games_66.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/78695314756.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 5040 bytes
SHA-256: 006b0d1c0013e80d2cebd5f6194b7fef7c4b3c004e2aeee8c563b03d8e77b88c
font_01_sfnt_off00006cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 10832 bytes
SHA-256: 12433f17067be3b0ff92dbbb22a44f60691c6f8c851a6aba7d5879bb7b1d4a06
font_02_sfnt_off00009164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9164 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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