Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbaaa8e2a248bd98…

MALICIOUS

PDF

44.1 KB Created: 2020-10-07 13:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2a794d46d05735f470adb6cbf0492f18 SHA-1: f0862c48664b4597041db3b51cdc44139ccec632 SHA-256: dbaaa8e2a248bd98d573a0acca8641caac120ee26b4f57c741052a38e6818024
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://gettraff.ru/strik?keyword=what+to+say+when+you+talk+to+yourself+book+pdf In PDF document text
    • http://files.wwidbq.com/uploads/1/3/2/8/132815296/2f83e99ec77.pdfIn PDF document text
    • http://baxatef.xabierbasterra.com/uploads/1/3/0/8/130813042/vifojop-teweva-kosorale.pdfIn PDF document text
    • http://xalegak.layagsug.com/uploads/1/3/2/6/132695601/1846340.pdfIn PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/98169507517.pdfIn PDF document text
    • https://site-1042100.mozfiles.com/files/1042100/73723608454.pdfIn PDF document text
    • https://site-1043406.mozfiles.com/files/1043406/55554842202.pdfIn PDF document text
    • https://site-1044518.mozfiles.com/files/1044518/60569107116.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/48030769865.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/54519365-11ed-4fef-807e-54f043bbb3bb/lelukalejolozaziru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e691a719-fd30-4b0f-ac0f-5d67ccf9fbee/73216794679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bf9ceb-28c8-433d-94ea-4efbf4d7ad16/sufagumivovasufepeluxuruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bed3c30-e06a-47ae-bff5-e51570fe168f/vusijopi.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_off00006e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E52 5540 bytes
SHA-256: a8f4b3ef70d51b42808248d732598f9dd13d9973a4bed9fe322a45e720c89716
font_01_sfnt_off00008138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8138 10088 bytes
SHA-256: a885aa32060ddc707819721f78966f4887ac23e4f08e7a450de53587034019ae