Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a84ae260f2d4f3…

MALICIOUS

PDF

54.4 KB Created: 2020-10-27 02:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 0362a352a6ba27d412c5d5bb07cbd62d SHA-1: eb9f3c292fb409446a939dcd365154cda4add404 SHA-256: 81a84ae260f2d4f3cb4060f0216f19280a9078d9c09dc16f98204f9fed7d6474
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://ttraff.link/pify?keyword=anime+4+you In PDF document text
    • https://palarijebatexo.weebly.com/uploads/1/3/4/3/134338538/1416138.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/56c58af.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/vanixepexikadokivak.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rotesojelunemiroto.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5f8d98b9e2cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5f90a75ddcad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5f957a1daadff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f94de542eabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f9042f3b2732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8748ba01078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f8df4339d69f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5f8d805531307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f87653e536ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5f8c4c0c1bf6d.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/pebofezujizu_wuzafe_tevodujiwaxu_mujemiw.pdfIn PDF document text
    • https://niliwuwez.weebly.com/uploads/1/3/4/2/134265541/jesujuji.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/zolopetadivo_gatudavolufeg.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/4399944.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/rojod.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009636.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009636.bin)
    • https://uploads.strikinglycdn.com/files/b722d669-312a-469a-9172-2f28f02519aa/6679863624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7579d87f-9547-4196-a051-39a06f417980/85590880369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0016a77a-68bd-4fdd-902e-531e223a4684/11057269436.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 extracted file (font_00_sfnt_off00009636.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9636 4492 bytes
SHA-256: 6c57441199f545a458c84709bdabccdcfcb044d30d5a94c718bdcc212c8e27bc
font_01_sfnt_off0000a57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA57C 11700 bytes
SHA-256: 9bdff75045577aadd35cdb04fc74b90e33fe721e31fac7ee74da613b858bde0b