Malicious PDF — malware analysis report

Static analysis result for SHA-256 4255dffc6eefa620…

MALICIOUS

PDF

39.1 KB Created: 2020-10-27 06:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 73dcb59c522f9aa1c1ad57e0c785c0be SHA-1: 1329d81d591e3f05c841e8e918ec8cc635e30ed1 SHA-256: 4255dffc6eefa620786cd440da15c265daf901bd031f3c31a3fffefff0d93280
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/wb?keyword=books%20by%20apostle%20joshua%20selman%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f927fb5114ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f8b7a8b07ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f89d07be516f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f89d6ddb9518.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wonoti/wagiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/libros_de_anselm_grun_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/jupukarosoregenavutufate.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/automated_logic_webctrl_v6_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c69e883-251f-4be7-8781-5e264db8a3cb/kejosubefujitirenova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22b59a8-9ea8-44ac-9932-478948009f9e/wwe_2k17_game_download_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/808e13bc-2072-4acf-a7dd-f30e9307ab40/telenosabopexewaxawevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5767/5932/files/84577974369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7921/4273/files/uts_handbook_forensic_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2885/4964/files/cost_of_living_in_puerto_rico_vs_miami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9335/1318/files/tim_cook_leadership_style.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/amar_ujala_e_paper_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/vubomej.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/gupekadeb.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/cover_letter_for_finance_job.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/synthesis_of_nonessential_amino_acids.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_off00005936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5936 5616 bytes
SHA-256: 586dc84f9cb326ceb614e72eb0e8df08070d4dd95af9b53bca89cfd17ac4472c
font_01_sfnt_off00006c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3C 10024 bytes
SHA-256: f9daf8778b25c1f11c4bb5d8cd173b3dbbca3f4a25673580eee6c3bf6e331edc