Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aaaf97bf3de7640…

MALICIOUS

PDF

37.4 KB Created: 2020-10-06 23:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b9b9a76adca7ac1711807204ae2b0872 SHA-1: 29bbd1a89f1becfd4316dc3b1a366a21f1e672ec SHA-256: 3aaaf97bf3de76409dd9892e2bd81a525605ff90f26a587d2ac62d14ad1f8c62
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://ggtraff.ru/strik?keyword=digital+scale+apk+download In PDF document text
    • https://site-1040777.mozfiles.com/files/1040777/63436329936.pdfIn PDF document text
    • https://site-1040008.mozfiles.com/files/1040008/xilixidatidogokutakixe.pdfIn PDF document text
    • https://site-1038602.mozfiles.com/files/1038602/60503206073.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/jimon.pdfIn PDF document text
    • https://site-1039954.mozfiles.com/files/1039954/92021322287.pdfIn PDF document text
    • https://site-1042627.mozfiles.com/files/1042627/9074797902.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/94815305527.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/ketalimuj.pdfIn PDF document text
    • http://koweme.tinyarcademachines.com/uploads/1/3/2/6/132681865/9a286e386f8c24.pdfIn PDF document text
    • http://files.actorsworkshopperth.com/uploads/1/3/1/4/131409037/wurakegiduzala.pdfIn PDF document text
    • http://files.figsandflights.com/uploads/1/3/2/3/132303286/togabaritaxi_vaniz.pdfIn PDF document text
    • http://litabiz.tool-hire-shops.co.uk/uploads/1/3/1/3/131383914/fimutat_nekatuvikufexi_jomilogatijowiw.pdfIn PDF document text
    • http://temevaraw.glittergluestudio.com/uploads/1/3/0/9/130969431/acc2d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4353/2185/files/2001_vw_passat_vacuum_hose_diagram.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_off000053a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A1 5300 bytes
SHA-256: da251dd39b8e635ee62e6e433206ec8e74fea41a6f43772730b2f52e53b9227c
font_01_sfnt_off000065db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DB 10360 bytes
SHA-256: 0cb4d55c9a9005bec2459206143d369561a47e2cae84c9736037b3e7df67e327