Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af8c8c92f80491a…

MALICIOUS

PDF

44.0 KB Created: 2020-09-30 09:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f5580ce159daf2f2a5e147bf92ba5bda SHA-1: cead4a898370154d8d266005265e7915382af67e SHA-256: 4af8c8c92f80491a60d87c5e2b498310e5dc624b56add683ae858079175d1007
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=animal+abuse+essay+pdf In PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/pukilofedilulofonazevivu.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/48241342943.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/remepudigofewepipi.pdfIn PDF document text
    • https://site-1037054.mozfiles.com/files/1037054/88016053383.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/kakuwixelupema.pdfIn PDF document text
    • http://files.malahidelions.com/uploads/1/3/1/4/131482963/6f43090.pdfIn PDF document text
    • http://files.rittenhousementalhealth.com/uploads/1/3/1/3/131384284/3895856.pdfIn PDF document text
    • http://files.wendyachatz.com/uploads/1/3/1/1/131163747/ff2614eda7dd.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/1/0440/6027/8936/files/89851701981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/green_color_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/sonetobapafileniponedan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/gufubixawoxasematanon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/39569220342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3567/2219/files/vewesafinoganirol.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_off00006f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F38 5320 bytes
SHA-256: ea0cd0d64baafff140a1cda3f17ba749742095bad462effb5a2ffc7af3193202
font_01_sfnt_off00008141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8141 9936 bytes
SHA-256: 1384df81d526f474ab656877c924ebf2fab12cf0127f2fe566e924f072c77e26