Malicious PDF — malware analysis report

Static analysis result for SHA-256 4787459b191386ef…

MALICIOUS

PDF

75.1 KB Created: 2020-12-30 20:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 6086d99829a683eccdadb9e4b24d122f SHA-1: f998db2d382b30998d47a96f516c7b4be41de9b8 SHA-256: 4787459b191386ef00be244b162231c5f64394ea5d29c8ec04fc67a8fb95a4b2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=tpcastt+connotation+examples In PDF document text
    • https://dujajiworexu.weebly.com/uploads/1/3/4/8/134848881/lulesukakuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_5fad658ced31e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5f94355eb7f8d.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/ib2hif7/22797984031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fe44ca292cc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405662/normal_5f9267489dbb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_5fb7fb3c85be4.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/e476421f-af5c-40dc-a301-65d38e048846/avatar_star_sea.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/cisco_anyconnect_free_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/fanew.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/yahoo_mail_can_t_attachment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a3f7d8-ccae-4c38-9e86-cf7364bebc31/gipokexulewetirotowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52027136-c5be-40cd-94de-d5e5b894e6ed/wamejemigoxipu.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/20926074143.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/phosphate_group_transfer_potential_definition.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_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 4788 bytes
SHA-256: 90b23013a7957accadbd40808f4c318ca423c56ca0b6df29c641d2bb2f06108b
font_01_sfnt_off0000ecf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF0 10796 bytes
SHA-256: 36a4833ca6a0b93865b552509913bcc09d61622312b39e85cd01de80ec731bd1
font_02_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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