Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8ef43f93acf658…

MALICIOUS

PDF

39.0 KB Created: 2020-11-06 15:25:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 2081ee65f953ca20f57136b3603d9c54 SHA-1: 4df4ff2e9fa898cc7adb27ed87230c0713f3b1c8 SHA-256: 5d8ef43f93acf65888ec4478bf5aba71d2f196990b05c01ec3efb3d08cc590e1
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/wb?keyword=rwby%20summer%20rose In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5f9bb306bfce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f88413aabda8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5f94e879d991f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8f95233ee6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f89db4a85dcf.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/69eb5d80-6282-40b6-9e12-7aaf39388f5b/45544302495.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/27786069087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c07a87b-8f6f-41ba-945a-e783c5cdd448/lasugapujigamugeseruverix.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/sql_server_database_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43b3824-6d1d-474e-aff3-5b7661d812b6/wevepo.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_off00005749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5749 4932 bytes
SHA-256: 51101a5efa6cb0aadcf9b2b570962684f0dc57f00167beb8b5b00283bc2d6ebf
font_01_sfnt_off00006813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6813 12400 bytes
SHA-256: 2c0e7c677da418e0aace763023d40d04522c8066a83f9bdc23cc536a2ce33f59