Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3d223d88709150…

MALICIOUS

PDF

38.6 KB Created: 2020-10-09 01:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 3c120278351c942d95ec0e957b475d51 SHA-1: ccc5f0e10318a45d37a3cf87148d83efa6387e2b SHA-256: 4e3d223d88709150276b63af34cd8f8028be0c83a04326182b56b5bf6092d3d4
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=nmms+book+pdf+download In PDF document text
    • https://site-1039886.mozfiles.com/files/1039886/89081758096.pdfIn PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/44712377021.pdfIn PDF document text
    • https://site-1037106.mozfiles.com/files/1037106/5438581334.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/68761169530.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/19868421633.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/7383124c-82a9-4efe-8da8-8d78b80de786/73208494763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9009a54-3f32-4ed5-a911-6e2ef5c9cafc/44045472487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25154cd4-dd36-4b05-8adf-7f414e5da253/88552150133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87762e8d-592b-433e-aae8-1e2478aae90e/pudomunefogeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4782e4-de98-4c90-bc90-197e3e18561a/23356854109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9029/2125/files/bopururoxameze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/toxijoxatazutirapemebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/rabomerizodumokexasegura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/sharps_and_flats_key_signatures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5201/5002/files/mobonijimufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0504/5668/files/22069801936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0790/1335/files/three_gorges_dam_location_google_maps.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_off00005840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5840 5356 bytes
SHA-256: a37dc7bbcd940f734e113986eed96c700a598215f5963e2252bc3a16d875ab6f
font_01_sfnt_off00006a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 10364 bytes
SHA-256: f849897e478f2e2dd8b13af3d925142f0d983fd9422ecf6e507b696f9cf5cdad

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