Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d448ed4ec9d38de…

MALICIOUS

PDF

43.1 KB Created: 2020-10-16 05:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 0d2e8292975d9910d92ab82422b244ef SHA-1: fe8036d7ae0f2473626bd1ebc223cb33a2ce845f SHA-256: 6d448ed4ec9d38de92a3eaeb62755517d56c8ffd1c64f9f0bedacba12536fb33
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=exercice+theoreme+pythagore+4eme+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f876357a291f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f870eeaf27ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f8715afe9a7a.pdfIn PDF document text
    • https://site-1038653.mozfiles.com/files/1038653/88496752792.pdfIn PDF document text
    • https://site-1040298.mozfiles.com/files/1040298/83720996938.pdfIn PDF document text
    • https://site-1039413.mozfiles.com/files/1039413/13607633205.pdfIn PDF document text
    • https://site-1039222.mozfiles.com/files/1039222/vugafinafogovubomap.pdfIn PDF document text
    • https://site-1039273.mozfiles.com/files/1039273/vabeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f88ffdd630c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f88ecabd406f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8730ad197c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f884b7cc8ba3.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/707a868e-d7a8-4ca3-aaae-0fcbf515442f/20540564661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6ed65b-78e7-4598-af1c-a04e1f92755c/xamidofewovagoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78894d54-6270-46e3-accc-bc97776f0bc8/63584455364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9251becd-b5b7-4937-a1f3-d3f0d519f4b1/69709490493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa89ab0-8f58-49cd-a004-ec8ad68f3587/19098408712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3906/4742/files/4510085670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4579/7026/files/fomobaraku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2407/5928/files/40002113876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f01f399-b09e-41d7-acb8-bf76b3d57167/zizusurodapitajop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f16420-4a66-4005-910e-6c99ff209635/vawomunigewixipe.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_off000065cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 5576 bytes
SHA-256: 06ccef36f888cd01fd78fc003f8a8268270358deb494ff8c26d9518bf033f5ab
font_01_sfnt_off000078b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B1 11312 bytes
SHA-256: 05fb2dbdc79fe62bf23b72b14735a0401da21e4e898da75a7d98b936f9b51ddd