Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a92a176939486f5…

MALICIOUS

PDF

39.1 KB Created: 2020-10-08 06:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 65347399e511c32af18fd99dbe8c4231 SHA-1: ff37c0692227464ab35ab803312fd3b943b66d33 SHA-256: 4a92a176939486f5c2bf3cf09e9269550be59e56cd0839e8b7ebcacd05e1edc0
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=comma+after+year+in+date+range In PDF document text
    • http://files.ildcc.org/uploads/1/3/1/1/131164164/a87ebd1.pdfIn PDF document text
    • http://pesifikem.thehoneybcompany.co.uk/uploads/1/3/1/4/131406650/a750184ea84ea.pdfIn PDF document text
    • http://files.bethanysphotos.com/uploads/1/3/2/3/132303126/ruvumux.pdfIn PDF document text
    • http://fasise.nourishmyselfnz.com/uploads/1/3/1/4/131407440/jegin.pdfIn PDF document text
    • https://site-1040997.mozfiles.com/files/1040997/67729456878.pdfIn PDF document text
    • https://site-1043494.mozfiles.com/files/1043494/98836741733.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/958bf66a-0de4-4ec0-ae41-bd606eedefe2/dujiwejozogerulidegar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654f1ddf-0dae-4ba4-9c78-46be2590cc0c/nomulegofana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0da10ec5-3b25-4e3c-9143-b0913f049f02/15558050948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8645/0330/files/bootstrap_file_upload.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0506/5890/files/confederate_vs_union.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/57363510430.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_off00005c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C78 5024 bytes
SHA-256: 132897077ac373f5f9b5abb23e7b6ff97175fc9210d45e01db79f5dc7007790d
font_01_sfnt_off00006d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 9980 bytes
SHA-256: 6a0a5b7f1e273f62d8dd8a1189e11e29fc10df52cff0f8ec8fe3ec853bc589c6