Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fbfadd2d6112af…

MALICIOUS

PDF

44.7 KB Created: 2020-10-10 08:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 044b8d4ebd816f08a0a7d95c4ff2e620 SHA-1: f9b6a4602074906d0f4c73a2217d7249dd192b4c SHA-256: a4fbfadd2d6112af15d1c01dfaf509d45c395ec716a104bee75d4b4f8f56288c
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/strik?keyword=algebra+2+second+semester+final+review+answers In PDF document text
    • https://site-1043686.mozfiles.com/files/1043686/92821506572.pdfIn PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/vefikejerosuf.pdfIn PDF document text
    • https://site-1039645.mozfiles.com/files/1039645/41221677267.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/kowazedonulorawuvum.pdfIn PDF document text
    • https://site-1038590.mozfiles.com/files/1038590/romijavojakakodazowusulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006f09.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006f09.bin)
    • https://cdn.shopify.com/s/files/1/0487/0458/5878/files/belated_happy_birthday_wishes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8440/7199/files/seunghee_oh_my_girl_profile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/west_carrollton_high_school_football_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1712/1177/files/wifudubunajegovitan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2844/1244/files/linopak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0a694e-c7b1-478b-ba4a-a1400f29cf31/33774527679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa06077d-a13d-42d9-831a-2d44bb174dda/5685606535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c68af4f-3aa4-4440-9536-730c68376f15/948675995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb66d6a-ee59-42a7-84fd-cf3090a9a103/27725353657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af683515-6b45-465a-9107-22e72cad4de0/xoxokizajerarufuwojoboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fbebbb8-3a42-4a99-891b-ae8a29d293de/27783408546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07cb0ff7-e7be-48be-a233-be05560a4c2d/40165661653.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 extracted file (font_00_sfnt_off00006f09.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F09 5752 bytes
SHA-256: b7cbc80fbee59014913956586f12eb1c08902fb03ae73ffd030c954774e496d8
font_01_sfnt_off0000829f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829F 10288 bytes
SHA-256: fe03301a6a1a50524f3e8cdf67bf19501258263060369aaced5e19695ff359b9

Open this report in the interactive analyzer, or submit your own file for analysis.