Malicious PDF — malware analysis report

Static analysis result for SHA-256 445587b2fbb8568c…

MALICIOUS

PDF

41.7 KB Created: 2020-10-15 22:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: c769d7ac8323b4b170c82632e6f47fca SHA-1: 51b193a39bcde19287720f1e123cf289284bad60 SHA-256: 445587b2fbb8568c877f8c621d70cfb4d9e7c0308c7940f29bda2cc5fc07c188
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with critical heuristics indicating it's a malicious redirector and part of an SEO link farm. One of the primary redirector URLs is https://cctraff.ru/wb?keyword=elite%20dangerous%20burst%20vs%20pulse, which leads to other PDF files hosted on weebly.com. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed to lead users to harmful content.

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=elite%20dangerous%20burst%20vs%20pulse In PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/lofenexa.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/fuzimokim.pdfIn PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/da9fa2fd.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f887d59014c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f87fe15a48a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8754474b3eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8732ddbad2b.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/05e55ba4-0f8f-4054-aafa-c7c09db20fcc/70772053766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2a3c08-9581-4749-bd6c-bfddd4d84271/57724266300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489950ca-21fc-4f66-9fd6-67b4c03e63b9/73600833848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dcef2fe-e8f9-49af-9425-ff0060643857/65657136617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6fea6cc-44e7-4212-b9fd-9726dbd276bf/93234531392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8236d86f-4945-490f-86a0-660e4a6b1564/derakomuludesono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c1822e-e334-4bb4-8846-910fb716e0fe/manizipubese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc52d56b-d0ab-4fc9-bb9a-4f4cce770b1b/98423677578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5962f48-9510-4152-8b75-babe5a9e3ad5/vijodajoniro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b27e9ef-25ee-4b61-944f-d497be8deae9/zezafab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9918/5312/files/operaciones_de_matriz_matematica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6706/7554/files/4047271331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8597/4689/files/79539079347.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_off000065cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CD 5284 bytes
SHA-256: 3b16f6f3f5c8149d3449a01d30eaf2dac80c55ae94efb8baf071bc9491ffa7ab
font_01_sfnt_off000077ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CA 10148 bytes
SHA-256: 6e30a238c49a38429f0f61d1e02e78d9c5710d60ad24bfd856d59e24ca59be26