Malicious PDF — malware analysis report

Static analysis result for SHA-256 4251f6f8bfcb3c56…

MALICIOUS

PDF

74.9 KB Created: 2020-10-11 08:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 930c7aaa9e14f8ab55ad5f619abffcf8 SHA-1: 584b52f9e4a3d709ac4d79803e2bc2579f99f124 SHA-256: 4251f6f8bfcb3c56c105c0f70b4be62bd929c9714b46dfd7cb8fe83cd8faf909
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=ranciere+the+emancipated+spectator In 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/6029214c-d49a-4d09-8b23-14e9d8595676/39213774806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839e55ab-5b7c-4d6d-bd52-f63bb640cd67/jukolelilibula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b8c9ae-5036-4b1a-8838-08b5bdbed408/75012964453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a31c3ce-3c3c-444a-9eda-c0fa2f9a4f13/71133613387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ae05d2-6abd-42c7-ad9e-bc63d8014823/92050438511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06856a54-3aa0-495b-9283-fdd8ed14e69c/kurowodafudilezabezexus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4829/9417/files/97416208790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4948/0092/files/1234539069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8462/0985/files/bevisosivapelov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0701/6866/files/spiral_7_episode_guide.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_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 5288 bytes
SHA-256: f6c013f1b6a109ae1d70409e0a1a0260fae85f2b9dfb08cca18b86ea9ce727a0
font_01_sfnt_off0000fb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 10076 bytes
SHA-256: 3fa5727492272cbbfba33c620e42f9f7166e618d3cd168034d85500f55e220e7