Malicious PDF — malware analysis report

Static analysis result for SHA-256 478c796feb28c54b…

MALICIOUS

PDF

31.9 KB Created: 2020-10-30 03:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: c1b489a807d811896588078d3c57b3cb SHA-1: e22a9677da5a4f65f1a829778e686fcc4274cf9a SHA-256: 478c796feb28c54b00e76fbb1d814a78bade4373b63c6e6d4ff29156b673dbb1
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=bulk%20rename%20utility%20manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f905197a2c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5f922cf2578e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8723f79f9d4.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/1/0506/7082/9757/files/pathfinder_character_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0449/2438/files/stm32f4_reference_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/41683838852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2055/3887/files/super_sad_true_love_story_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5247/2764/files/hitchhikers_guide_to_the_galaxy_42_scene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/android_in_app_purchase_without_google_play.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2510/3549/files/haben_und_sein_prteritum_bungen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1679/7857/files/diskdigger_undelete_root_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/hilti_hammer_drill_te_70.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_off0000416c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x416C 4868 bytes
SHA-256: a366f11da2ff344e6248d81d82d40ce84e2f7fcf0abad00921a7fc2555413368
font_01_sfnt_off000051e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E9 10552 bytes
SHA-256: 14231e48962e1001be0aef4a230a1a959367e8269c60205ae866aa320723b0fb