Malicious PDF — malware analysis report

Static analysis result for SHA-256 534ffddf36dd1b19…

MALICIOUS

PDF

44.5 KB Created: 2020-11-08 11:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0a3ba5727fc3807450445b25e75d5bcf SHA-1: e8616215bc70ca794b5c0f877779337f7c18c177 SHA-256: 534ffddf36dd1b1920e4ee7d665458e45e58cab9ca9b48dde8400957b1a02132
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://traffmen.ru/aws?keyword=color+mixing+worksheet In PDF document text
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/vewewiwapasewivaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8b0a2a5e3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_5f9ef3189c06d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5f99998c48eb5.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/93742282b9c.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/sujegelokebazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f943d377e707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5f9257e2261b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/926b19b7-d1c7-49f0-b165-b6728f5cf4ba/52383691603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4433d26b-f442-4e3b-9979-1b977bea9a13/bowflex_motivator_2_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecda51fb-9c87-4120-be88-d2e616b61159/bufunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdaf4499-67e3-426e-b8c1-97a8c4b672df/bemopeduwupemeze.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_off00007123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7123 5020 bytes
SHA-256: 78fe790934a69a09dfe94f76d275510004d45edda4213b81775c606a55b19714
font_01_sfnt_off00008223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8223 10352 bytes
SHA-256: b1583ce150371a793add480fc78cc23327c68d729b9387a841784f024bd85fd4