Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2f83304032fe8c…

MALICIOUS

PDF

40.0 KB Created: 2020-10-30 12:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 88111ff1be4d3692ac0c3bd911e730dd SHA-1: f5aa5b9c58f640f5635b1ace949e4257267dfc05 SHA-256: af2f83304032fe8cbac8c3631cfd41647ebc60d98dfdca51764d0a8c3efe1b63
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=dividir%20pdf%20en%20dos%20archivos In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_5f9587b642164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5f92d27723d98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f95fed281eeb.pdfIn PDF document text
    • https://sabitafev.weebly.com/uploads/1/3/4/3/134308069/konutusab-ruxosijidabumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5f8e43bd589f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419003/normal_5f9be34d9ba6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5f90f2cecda33.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/bofejivazibap_dubebix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f87053d62b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f979e07d29d5.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/1/0486/5386/1032/files/sidakaturulinimixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3337/7947/files/78411150093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9677/2249/files/intelligent_business_upper_intermediate_skills_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/8086_microprocessor_tutorial_free_download.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_off00005a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3C 5268 bytes
SHA-256: 6a575a6ca6d3d2853b3287cb8791574a2ab06226c386af2b89e2ce914ff1261b
font_01_sfnt_off00006c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2F 11616 bytes
SHA-256: 3333abb192f0b1274016c8fcf9183d5aaa9c632742ec961df2a79d204944e8f8