Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe3771dad0a7db6…

MALICIOUS

PDF

41.1 KB Created: 2020-10-04 20:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b168c34500b2d189b3ce87aaf33d914d SHA-1: 94e15049c3d9da9e75925f096fa55488f22e3e3b SHA-256: ffe3771dad0a7db6c0ed77f2768d0f0bd350600cb54081e1fdfb5fc46404a506
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://cctraff.ru/strik?keyword=restaurant+success+by+the+numbers+pdf+download In PDF document text
    • http://mivijobop.modernsageevents.com/uploads/1/3/1/4/131454207/gevidodikuzote.pdfIn PDF document text
    • http://files.lesaannmolitor.com/uploads/1/3/2/6/132695352/vugeporovow.pdfIn PDF document text
    • http://giximil.roachinteractive.com/uploads/1/3/1/4/131409090/9022650.pdfIn PDF document text
    • http://files.mindwellmarketing.com/uploads/1/3/1/3/131398542/0adeb74c9e7d.pdfIn PDF document text
    • https://site-1043262.mozfiles.com/files/1043262/37487767240.pdfIn PDF document text
    • https://site-1036694.mozfiles.com/files/1036694/zutidororuviwulezotaf.pdfIn PDF document text
    • https://site-1038852.mozfiles.com/files/1038852/fafosepozozudaxagividu.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/94127568832.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/77302914054.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/1/0434/5813/4168/files/holt_physics_diagram_skills_harmonics_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4942/2500/files/bayliner_ciera_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/tide_chart_myrtle_beach_june_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/rotogitukoxodof.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_off0000611d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 5736 bytes
SHA-256: de672e132c052a2fb0306e578362cbeddcd9ae675280da8826b74831d5cedeae
font_01_sfnt_off00007497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 10180 bytes
SHA-256: 2edb84ae563217586b23f3c7e5f99c240563dca011e8ea49f32f28f44dfd9e85