Malicious PDF — malware analysis report

Static analysis result for SHA-256 4451982c76868beb…

MALICIOUS

PDF

41.8 KB Created: 2020-10-31 14:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-10
MD5: e3cfb66344de0eeced5b7807cf33820b SHA-1: b44d17e8f3834aaaa1989570519ed6da042acd06 SHA-256: 4451982c76868bebb8edd35849bd18481472dd587a4a9dfde29e2220efb7daf3
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/wb?keyword=inception%20time%20sheet%20music%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5f912e6a3d020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f8dfc8f118a4.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5f8f874331959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425738/normal_5f98393c6a2cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87028656adf.pdfIn PDF document text
    • https://pojosividadom.weebly.com/uploads/1/3/4/5/134524524/nozosogakefidan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/fundamentals_of_business_process_management_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d599e0b4-0739-44b9-8cfe-a42912a5dcd0/3599680931.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/ritizu.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/labetalol_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/bojiv.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_off000064f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 4992 bytes
SHA-256: d884dceb4e026f96e9b34dde2db782c938cc7185c7aa49ab8c6d7632a824c86e
font_01_sfnt_off000075dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DC 10656 bytes
SHA-256: 579e39e0d5fa2fc2e82c1f5046d6c29479df178627c5e6c078f4a4a839f1f936