Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffd797f2cf56c16…

MALICIOUS

PDF

47.5 KB Created: 2020-10-31 17:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 0e8ef2c0a71d7d207f7961749e1c113e SHA-1: d1cd240a7c9d06632d85edf7f18d97df5f324938 SHA-256: 7ffd797f2cf56c16ed1cd4a382a22e24638fdc7621db8d1a5e90895d0c937c0c
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://cctraff.ru/aws?keyword=%252410+gift+exchange+themes In PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/6128777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f88a83a03bf4.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/fexogi.pdfIn PDF document text
    • https://nebemono.weebly.com/uploads/1/3/4/3/134331812/muvopala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8a4c752008e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f8c38ba22591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f885153eed94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f8ae627ceb55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f870e4f8bb90.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006499.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006499.bin)
    • https://uploads.strikinglycdn.com/files/5a2a44ae-bb49-40c1-9db8-a73a6b02fcfb/55344097343.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/adjectives_for_descriptive_writing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9918/5312/files/42664710006.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_off00006499.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00009ba2.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00009ba2.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 5572 bytes
SHA-256: 4911ae3e2605959a5fc249202c505bfa28d3ebbd5f110cbe76246360fa234bc9
font_01_sfnt_off00007784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7784 10556 bytes
SHA-256: 4967061bd5ef69997ebc77ac6c15816ea176001a7bedda47a542cfa5de1cebd8
font_02_sfnt_off00009ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA2 16384 bytes
SHA-256: fb2ac63fb075d256b5587570191ecec806cb29c29da4ebedfc8653ce907d9040