Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd99ace63922c0b…

MALICIOUS

PDF

43.0 KB Created: 2020-10-05 23:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 00f98ed124dd5aabf082e8a3b553bda3 SHA-1: ff5e499f9018c4606390509b2bae2e4bbc1ea8fa SHA-256: 6dd99ace63922c0bcc5b72da6c1a7189365be4ace683c63d230e92e2f1e955c5
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://cctraff.ru/strik?keyword=cursive+writing+letters+a+to+z+pdf In PDF document text
    • https://site-1041613.mozfiles.com/files/1041613/61995895912.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/45481874838.pdfIn PDF document text
    • https://site-1039413.mozfiles.com/files/1039413/99724048024.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/xobideruwet.pdfIn PDF document text
    • https://site-1041846.mozfiles.com/files/1041846/32996090715.pdfIn PDF document text
    • http://files.lonestarspringers.com/uploads/1/3/0/7/130738622/089b71ba4.pdfIn PDF document text
    • http://gajosigu.team14235.com/uploads/1/3/0/9/130969352/tapuviruniz.pdfIn PDF document text
    • http://files.teressamediumreadings.com/uploads/1/3/1/6/131636825/gifupabibedob.pdfIn PDF document text
    • http://rogivugu.galwayveterinaryhospital.com/uploads/1/3/1/4/131453541/6274948.pdfIn PDF document text
    • http://files.bellabrowsspa.com/uploads/1/3/0/9/130969543/9667294.pdfIn PDF document text
    • http://files.soleorganizer.com/uploads/1/3/1/0/131070581/rizuribadi-vedurejakefoke.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/68849a09-ba6d-463f-9fd9-29844bd3c004/jowalel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafb6bd6-8d77-479d-b1aa-7cf394f7940f/wuzora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c7d2bf-f132-4a78-b579-9fd180919a96/zadinikamorarodugo.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_off000069fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FE 5316 bytes
SHA-256: 051b88a8e9133d62111e2bf5be73c7aa97b5e166898b1d213a9e2aef62b658ea
font_01_sfnt_off00007c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C43 10320 bytes
SHA-256: ee34334907f12569cec1e949ccee593857c296e9688e923f74ccfa1ad9ae1359