Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7adf4e3c989110…

MALICIOUS

PDF

35.9 KB Created: 2020-10-04 01:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6108ad5a344dcaeec8ed404d8839cecb SHA-1: 2e84674fdf36b15db5b680861038623c1a7cd877 SHA-256: 9a7adf4e3c989110f65431873f5ac894c617b5b71386385ade622eaaa9df2199
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=bathory+blood+fire+death+download In PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/nunenikewunini.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/ruzevese.pdfIn PDF document text
    • https://site-1039330.mozfiles.com/files/1039330/55684632292.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/wetulukafog.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/11601950549.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/sofoputadevizemi.pdfIn PDF document text
    • https://site-1039911.mozfiles.com/files/1039911/lijexomisujerolu.pdfIn PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/sovixuduxu.pdfIn PDF document text
    • http://jovexu.designsbymanali.com/uploads/1/3/0/7/130776553/5911325.pdfIn PDF document text
    • http://files.sweetbrookfarms.com/uploads/1/3/1/3/131379343/metutoxitilez.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/361333c4-fb02-4469-8415-8853b209c0a8/boduririg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4499f8-356e-4c57-bb64-138a733ca565/11261731918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8466ca3-aa7d-423e-891d-3060c4ffe7bb/dubogisetuturizoxiw.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_off00004e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E75 5200 bytes
SHA-256: bf7c0d197ceac6d1cd26264094a473e8762a13d27b2d2ca0d9b62d74c016a521
font_01_sfnt_off00006033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6033 10064 bytes
SHA-256: 5f870c02c03ad00489676de73644bd38a36cf725ab309b6af8ee76cec3ed60eb