Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af7b0e39b95ae5d…

MALICIOUS

PDF

45.8 KB Created: 2020-10-28 07:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: e22ba087cd6011460bd7566de1d25ae9 SHA-1: 69c75a800bf141de605538fe53d18dff9abeca0e SHA-256: 4af7b0e39b95ae5dc30dcef9fa9383e8c407efafb00dd199b9b9548e35fbbfe5
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=the+non-designer%25E2%2580%2599s+design+book+pdf In 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/94ace184-bfa0-44a7-99b1-b13eb62bddab/hitomi_and_milena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3793c16-d5a9-437d-8f0a-3d248b588b71/joe_michaels_photography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02dcb34b-14b8-429f-9cf3-24f9e85ef388/70170651186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3ae834-2163-464d-8a81-329b8e66ffcf/kanidilinofiwed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd7f037-87bd-441a-8867-90e7e138240b/keha_mehaanika_fsioteraapia_london.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/betanewumuweneloxi.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/jatefifomajuberobed.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/banach_steinhaus_theorem.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/low_back_pain_physiotherapy_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/design_of_municipal_wastewater_treatment_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/30305045581.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/difference_between_oracle_10g_and_11g_and_12c.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/catia_composer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/8038/3385/files/diwipalukibusepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7806/0698/files/tujix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1225/7952/files/19848081924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8624/4757/files/vampire_diaries_jeremy_season_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3771/2806/files/kukupala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/bibevomit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2159/7333/files/alcoholic_hepatitis_guidelines_easl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e740a5a9-c808-4279-9a59-df7b2de20396/65693979615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccebced3-74f0-4e3b-8187-9b463f2eaff8/4332032021.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_off00007048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7048 5296 bytes
SHA-256: a657e5640e9758acb9ad74634c034bd614408d0b3e65b09e1924d52d5fd72b34
font_01_sfnt_off0000825a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825A 10900 bytes
SHA-256: ec50387c24ec604c29dae97f0ec581c8abe698f37259ac131a2f7cc2a2e516b6