Malicious PDF — malware analysis report

Static analysis result for SHA-256 4781270f0ed1ab2f…

MALICIOUS

PDF

43.8 KB Created: 2020-11-09 08:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 8f62f4595f81a0bfd6ae8039211eafec SHA-1: 222f58ab3942452cc5b16db72aa9d93c6aba746e SHA-256: 4781270f0ed1ab2f3487a9664e2f7521a31bea1f4335a16c110bab135c18093a
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=zetetic%20astronomy%20pdf In PDF document text
    • https://fofafobef.weebly.com/uploads/1/3/4/3/134349457/6681df9f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5f8c99f45db46.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/mejozixex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f86ffaba623f.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/1b6a0675d52c2df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kunuvulu.files.wordpress.com/2020/11/jonavil.pdfIn PDF document text
    • https://gemaxabireme.files.wordpress.com/2020/11/dnd_5e_guide_paladin.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/fisironovonober.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/fangamer_free_shipping_code.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/an_introduction_to_astronomy_and_astrophysics_pankaj_jain.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/foam_heads_amazon.pdfIn PDF document text
    • https://wumevom.files.wordpress.com/2020/11/66792402099.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_off00006b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2D 5328 bytes
SHA-256: 4799de82c978334c75828f5a9dfaa96ccce078895aa33849d5a871f0f8b818a8
font_01_sfnt_off00007d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D46 11348 bytes
SHA-256: c7a600d7c2c63d4dcd4a1779e369b8247863e166186e4e4e40a980841a9d534b