Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af3749a20efc2e4…

MALICIOUS

PDF

39.0 KB Created: 2020-11-04 03:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 9aa64c36aa1ba6e84c1ba6b8000536e8 SHA-1: dfc838ffd9b5f540b87942868400bee41608ffb2 SHA-256: 4af3749a20efc2e4251fff44004958947285a3e219564c8d909767083b7d570c
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://ggtraff.ru/strik?keyword=dscraft+rom+download In PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/88b40badd.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/wanenime.pdfIn PDF document text
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/felafur.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/fogijebu.pdfIn PDF document text
    • https://tokunebejuz.weebly.com/uploads/1/3/4/3/134323577/8045392.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/6ef3c2d7-d525-4134-b4b8-c63358083ead/nubebixokiwexadadujeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6522e146-bfd6-49ea-884a-e534d21ff3a4/trust_apush_significance.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/bloons_td_5_hacked_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366eadc6-c0c8-441d-804b-7b741818984d/roxegizojunis.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_off00005b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7E 5256 bytes
SHA-256: 9c31d8b6c6ecd6b109ceae9b00e49b08c7f373f3f09d082da9312b2230433044
font_01_sfnt_off00006d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D63 10128 bytes
SHA-256: d0c4d20b69854bc21e8c444232f30e6b5689b739a0ead5e2ca73de86208abf63