Malicious PDF — malware analysis report

Static analysis result for SHA-256 4781d39e8be9b71f…

MALICIOUS

PDF

36.6 KB Created: 2020-11-01 14:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: f2a0320bf0eacc2a8d83eb68f2b71182 SHA-1: b1f9d1e82747d0a75f5c3a74bfc9955a46b99cc0 SHA-256: 4781d39e8be9b71fffec82f3b9d69f091d6e22df854f41ce1914baf366cdd08e
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://gettraff.ru/wb?keyword=auxiliary%20verbs%20worksheets%204th%20grade In PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/dasuxowezofuged-pakakin-dixogonep-wutufavejij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f8a9e15bcb5f.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nuziwozonugof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f93b804ac945.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/gewidaguw-logugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/mowodorixexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4242/5000/files/88242979851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c8f191-05e2-47d4-811d-8256dc6ff3f4/xiwifapinoduniponawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4821/8011/files/31093760011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8971/5883/files/brother_hl-l6200dwb_monochrome_laser_printer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2382/5578/files/juratowegili.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_off00004f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F6A 5692 bytes
SHA-256: 6685f7d65077e5bb72fb912781d70971e68bb195313c92a4073ecb43c9abd53b
font_01_sfnt_off000062eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 10304 bytes
SHA-256: 5a7f98a732b482bfab3dd2f74f1fb8fc5b272308dc3365fcd2570580e7efb46c