Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2243eb2855c075…

MALICIOUS

PDF

49.6 KB Created: 2020-10-29 05:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-22
MD5: b375397a7ae33b996611194f6be32a29 SHA-1: 7ba2e373a046262cc2e887ba1563e7f959b89451 SHA-256: af2243eb2855c0758cfab821ee569a04159dd4a4a33a912b592f35732cc5fb79
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/wb?keyword=passport%20application%20pdf%20filler In PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/sororiruwiwixeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f93e8463a2b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f8a0e9146e61.pdfIn PDF document text
    • https://kodowogokilikid.weebly.com/uploads/1/3/4/4/134466607/mefegag.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/98419b2d-4196-42ce-b9d7-0dd9a8fca29e/4796836888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/52445858829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/download_m_tix_apk_terbaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43cfc5c9-042e-42df-a906-8598e01a1d81/88180001725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be623c1b-c50c-44c0-ac03-edfb0f8cd5b6/vifokuluxugevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ddcf7e-8b2c-4174-8c66-8efbab4892a3/bagofiwapusemopuf.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/83577313972.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/software_architecture_for_developers_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18362a1e-a4d0-4c55-a143-f379977b9e74/95103469980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/bidusudolilexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf647ec6-70c4-464c-be3a-360d9e3f3b94/kutalonizovamimaxoj.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_off00008205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8205 5152 bytes
SHA-256: b0b02c31cc3b4d72a21cb2ab04f1f905fc654bd249816b3f4c2f0290bb0218ab
font_01_sfnt_off0000939b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x939B 11136 bytes
SHA-256: 51f29648e6f60f2ea66852cabfe96d98258863cc83066e44b2c71a3b098d160e

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