Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a56f0863a60f912…

MALICIOUS

PDF

60.5 KB Created: 2020-10-01 06:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 446bb345fdc9b13425e31e6f5588604f SHA-1: f7ea79edbf89dc6e280c37db7ef81a3c31eada51 SHA-256: 3a56f0863a60f9128655657542b5e3cd095f5f2c3b3a2750db6b92380066da2c
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=birds+pictures+with+names+pdf In PDF document text
    • https://site-1036918.mozfiles.com/files/1036918/93304796814.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/42104950651.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/xiliz.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/kozezotupufebudap.pdfIn PDF document text
    • http://files.mercerjourney.com/uploads/1/3/0/7/130740530/duxolesot.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/162db080-3a23-4b83-be9f-a298cfb16f8b/74874055926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3358a2b3-edeb-41fb-a978-da9a2c30334e/xarupogolovosopiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca1220b3-3f9f-4e46-8419-4ebd7cc004f3/43782365737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53bd441-fd8d-45f1-b902-875cf1b4d051/5056424838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0cd7c8d-9cd8-440f-9452-7a10732c0dfd/48607417917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63df31cd-2d79-482d-a256-4ebbc8439d36/liwefivuzafixera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ff560c-f6f6-45ba-a0b7-13273e82e537/zujikeperazuvuxusas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64fc6f1-ad89-4026-9e9b-f811722d8e6d/dexerevopewak.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_off0000a652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA652 5504 bytes
SHA-256: 1bd94af8e568f108779dbb76df5f0dfd689c00475ee73bf79b18f1efb956a20a
font_01_sfnt_off0000b8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EF 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000c17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17C 10268 bytes
SHA-256: 2a89ce7754ae33ff013f137c74912a61f67035a1285b521a493a5eea3cc4a462

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