Malicious PDF — malware analysis report

Static analysis result for SHA-256 425338960b16ed17…

MALICIOUS

PDF

48.1 KB Created: 2020-10-29 17:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: d81568c7526c0d321995dddbd9820db8 SHA-1: ea21a0894ce16252e454236dfc4eb92d22ae0446 SHA-256: 425338960b16ed17e2bf6db11bb40cc3eeee6173e6985c7dda6410c8d557a76c
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://cctraff.ru/wb?keyword=skills%20for%20project%20managers%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5f99ce2a0cec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_5f9a281cd5fa1.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/zaxulaxavurare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8707c1495b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f8b0aafafc2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f8c7a0e447c4.pdfIn PDF document text
    • https://xififaxapid.weebly.com/uploads/1/3/4/3/134344339/7663959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f8dd3c1a22cc.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/f60fa163-226f-47b4-9e55-f3f90c242b6b/midudupufip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac78b06-6a2d-4c10-b705-73e719613e94/gemikixilale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55932f34-5643-4ba1-9059-bef7dc91e834/84762268180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de377a76-c2b4-4f9d-965c-f8aa094f5988/63481647998.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000098eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x98EB 17788 bytes
SHA-256: 0c869f06a5ae180ecad9e60a2ccad6888a7fbb3fc454cf82c6022bd26c608895
font_00_sfnt_off00006115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6115 5720 bytes
SHA-256: 5bfc08439f5b5fa455193d037cca3b49c523c06b99de54d69331122507cd0dbb
font_01_sfnt_off00007486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7486 10900 bytes
SHA-256: 5110f38faff85a4893426ea013b20c2f9e1cd8bc3b8fbcb84953f69fd888e56a