Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d856c67480cf58…

MALICIOUS

PDF

76.4 KB Created: 2020-10-16 19:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 6325217a6b7534c128e36335c6c1c8ef SHA-1: a029feed6084f9df7fa58c1988d7047a533c31b5 SHA-256: c5d856c67480cf58f9072756a8c74088f055aecd0d27bcca3da4dc3c7ad0d0a2
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://ttraff.cc/123?keyword=1000+english+verb+forms+pdf+free+download In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/minajadusokovanadara.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/53a4596c090b841.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/godikiboli-takugeze.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/maxisite.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/laziburik-kabezuf-limerulinatud.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/92762df0-b2e5-4fae-a3dc-9008136ac030/sowoxotigulotomitekom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352cae72-a057-4a10-b311-f5ea04b2d22a/17947328759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07a18cb-d5e2-4857-83ff-827b7e08b011/23982081696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c1b953-193d-4445-ae32-ea5c4018eef8/xivokiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55658b3b-77bd-4e2f-bdc2-60c6b9dcc733/68417487065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2d75e8-fd7f-4cc1-b9c1-a322600db753/kedewupebopapopetejar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ff1f6c-506b-4852-9a5b-d2223d49f0bf/sowelinusurovilunuxilami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f629539e-68b3-46c4-9e46-538c0f2e1ea6/70883351594.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDD 5848 bytes
SHA-256: c8f275f62c3c68e69e3229b4295a3f97679fa4678c6f6c2e42a61ac804bdabfa
font_01_sfnt_off0000e2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A1 13412 bytes
SHA-256: e644b2b9f813e201bb80dd7716c264112f48ea519675d4ac21b629ce9bd53aef
font_02_sfnt_off00010d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 16172 bytes
SHA-256: 461a1578f80084b2f2ca998a6e716936969cc9b33b2976d66eaaa57f6abee57a

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