Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b39b662fd02cde…

MALICIOUS

PDF

42.5 KB Created: 2020-10-26 10:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c50e2efe0ed77234e7773c8f603405d7 SHA-1: 551df9969f64677b5e38abfd230ede4386307865 SHA-256: 20b39b662fd02cde0b96d5bfbc70a863a27d01b6ce02bc4740116644a2e18a21
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.me/123?keyword=mise+a+jour+android+10+samsung+s10e In PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/3e7ca7f.pdfIn PDF document text
    • https://galavalo.weebly.com/uploads/1/3/4/4/134464717/3978669.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/rejajofejaroxokomido.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/e858aadc461e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f88927844a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f8fddc4b9d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5f9333002199b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f899511f0e64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f888201b4c07.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/gujivojikol.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/tirutegebotafexomuzo.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/nakovo.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/fatupuzape.pdfIn PDF document text
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/mikajabururaveluzaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006717.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006717.bin)
    • https://uploads.strikinglycdn.com/files/2d14bb1c-ad8a-4fe4-9a77-a7d272bd7763/dls_19_brazil_profile._dat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276ede3a-ce79-436b-a7b8-00e2e3a19c86/nozakoxivon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7dacac-b0f5-4939-a796-fd159a37c1d7/94749401716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0eb8361-bccd-4b7d-9294-9eea5be769a2/46378340114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6535b2-0276-408a-95aa-ec8c7d90481a/learn_chinese_language_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5920e8-7152-480b-b05a-f751ba4199cc/nomuboxobopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba58e48-4265-4f0f-bf87-e14cb4fefc25/39065976262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12238709-ab70-4d0d-86c2-1dc6a4dcae1d/bogaradete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2431ae11-4203-4428-aa35-00d0eda0e6b2/jivurororupogi.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_off00006717.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 5388 bytes
SHA-256: d6c50e2b66873246253b3d2b6e16f3415631359ce1ead399284796e5ae7a3417
font_01_sfnt_off0000795c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 10380 bytes
SHA-256: c6326a6fbfee297cdcc6d2582532914bccf7f81e08f0616f50ebd9affca5636e