Malicious PDF — malware analysis report

Static analysis result for SHA-256 76aab62e0e4d2853…

MALICIOUS

PDF

58.7 KB Created: 2020-10-01 07:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0bf13238961e4db76a489c06ee6acbdb SHA-1: f48b07869043bc4f35925b09ca2d2bbc34961ece SHA-256: 76aab62e0e4d2853f30243914bbb2d66e9c3787366fb629954db63326a98635f
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://gettraff.ru/strik?keyword=hemitartarato+de+zolpidem+bula+pdf In PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/43388467177.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/9553588492.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/47143152881.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/levetijikibewivupa.pdfIn PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/zilix.pdfIn PDF document text
    • http://files.ubahnature.com/uploads/1/3/1/6/131606168/5053015.pdfIn PDF document text
    • http://files.nyholsteinevents.com/uploads/1/3/1/8/131857383/xosuri-wuxexat-lokigojegexox-fiviwika.pdfIn PDF document text
    • http://files.meridianelemptsa.org/uploads/1/3/1/4/131437139/2234903.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/1/0438/2323/5234/files/6728421675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7242/5636/files/kasoxiwebukotuneger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/93614739058.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_off0000a941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA941 5160 bytes
SHA-256: b0804b6ea7d77293738446cefe10003e0fcb237ea41c1afe2d9a87aa120eb835
font_01_sfnt_off0000bab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB4 10424 bytes
SHA-256: 63af5a39e3ae6d882998917235a4377d4568fb5761927642ac52975a372acd6c