Malicious PDF — malware analysis report

Static analysis result for SHA-256 6887dfe0c21e8921…

MALICIOUS

PDF

45.1 KB Created: 2020-11-08 15:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1571af2c0cb7478646274b0e1508d23b SHA-1: c9b8d8b20106c25b5bed30df3474ec7a7c0260b8 SHA-256: 6887dfe0c21e8921fdc3e5744d18eb06816da9218d134385013537130be7a8d0
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://traffking.ru/123?keyword=tyrone+s+unblocked+games+ragdoll In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f992d0ccee3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_5fa58c999dcb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5f9c4387993f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5f8d91acafbf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f9aeb2e8e37a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5f9f9de8bc161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://direpupiwabe248790905.files.wordpress.com/2020/11/10856063596.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://pubosepiko.files.wordpress.com/2020/11/11242773125.pdfIn PDF document text
    • https://vinutolaxuw.files.wordpress.com/2020/11/jurassic_world_alive_apk_mod_unlimited_money.pdfIn PDF document text
    • https://nifesewuwa.files.wordpress.com/2020/11/medical_fitness_certificate_for_leave.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/10860536919.pdfIn PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.pdfIn PDF document text
    • https://zotimopideda.files.wordpress.com/2020/11/jarexakekedukovawelasife.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_off000070a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 5512 bytes
SHA-256: 15b6111b0541ca5a85fc423346cf5589c5b86213752240aeb8b067c945df3e19
font_01_sfnt_off00008356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8356 10548 bytes
SHA-256: 200c1b83eca849f5b06f491b7a1233e61b2b34e8fc3b9ecb64bd772af176036c