Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f2eb588257610c…

MALICIOUS

PDF

33.7 KB Created: 2020-10-12 03:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: f04d6317b78d50ce9e6349da344f3d02 SHA-1: 7d3abaa92cd4c912cd0e8610959fb8f2e6b4d96d SHA-256: a4f2eb588257610c308f5ff2183951e6196abfd761f14ce2837117d33cd37c07
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/strik?keyword=trane+byc+nomenclature In PDF document text
    • https://site-1048244.mozfiles.com/files/1048244/8334781696.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/lasozodekovevopu.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/puzoxarubirotuf.pdfIn PDF document text
    • https://site-1039719.mozfiles.com/files/1039719/musixexexu.pdfIn PDF document text
    • https://site-1040209.mozfiles.com/files/1040209/38455084780.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/sakita.pdfIn PDF document text
    • https://site-1038601.mozfiles.com/files/1038601/75138616500.pdfIn PDF document text
    • https://site-1039817.mozfiles.com/files/1039817/kuvipusisazanup.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000474d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000474d.bin)
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/runixidodusokixaxones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/warren_buffett_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6791/1573/files/zombs_royale_aimbot_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4731/2282/files/stimulus_diffusion_definition_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3106/3449/files/xajubuzavulewikum.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_off0000474d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000474d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x474D 4956 bytes
SHA-256: 52968f62f3ad7bb104c702f607bb55b3443434f4ca08a2980db8ed008e7e05ac
font_01_sfnt_off00005811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5811 10048 bytes
SHA-256: 383be2111a7f3c88eba5d592aa08297b39a177588fed32afeafe9db35fcb458f