Malicious PDF — malware analysis report

Static analysis result for SHA-256 729772eeb481de64…

MALICIOUS

PDF

43.8 KB Created: 2020-10-01 16:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 24d561ade8a6540a7ffa846879ba6011 SHA-1: cac2826ec7974b90656e6d89a27258343e391be7 SHA-256: 729772eeb481de649fb680c19fb4cf51ec267d8744dc915fc51eece7fe95eea8
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=brutalismo+en+mexico+pdf In PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/suxodixijejuzajuxofutizuw.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/63393764061.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/bopus.pdfIn PDF document text
    • http://vinolenaw.ricky-liquor.com/uploads/1/3/2/7/132740250/917c9f7db674a8.pdfIn PDF document text
    • http://files.woodsilks.com/uploads/1/3/2/8/132816195/bolatekida.pdfIn PDF document text
    • http://xuralo.38plus2productions.com/uploads/1/3/1/3/131398177/nejuwisugobad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/toys_r_us_assessment_questionnaire_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/81425875987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/dakupasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6968/1047/files/bukuruwuworesujugenomef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AE 5420 bytes
SHA-256: f424c086353ea22359428377071abd7824a961c098f59a9271900fd1a1a6f6ac
font_01_sfnt_off00006709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6709 15256 bytes
SHA-256: c4e38d434622cf510e323a160fdf73d74ec9b8aab5bc3abf5219a76a6e436a17
font_02_sfnt_off000095c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C3 2832 bytes
SHA-256: ceb490d0841d21a0e88caf31c93d633660a81ce85068c056025f9b059654488f