Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdaa8931819fc524…

MALICIOUS

PDF

43.7 KB Created: 2020-10-03 06:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 222337963d356919f8ccdf2466d49a6c SHA-1: ef984d0e796a58174fa92443e9bbf422af7d428c SHA-256: fdaa8931819fc524a99c101d63625a6bb605005cad96203234cf8e392ce08b5a
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=baumann+control+valve+primer+pdf In PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/63989485470.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/65669292037.pdfIn PDF document text
    • https://site-1037848.mozfiles.com/files/1037848/85893665938.pdfIn PDF document text
    • https://site-1036805.mozfiles.com/files/1036805/febojaxegalakolipojaju.pdfIn PDF document text
    • https://site-1038556.mozfiles.com/files/1038556/80959992483.pdfIn PDF document text
    • https://site-1037865.mozfiles.com/files/1037865/vixijusokakasagodurovebop.pdfIn PDF document text
    • http://nuduke.malvern-electrics.co.uk/uploads/1/3/0/8/130813934/2025934.pdfIn PDF document text
    • http://files.oceancountyroofing.org/uploads/1/3/1/1/131163559/soxitunepef.pdfIn PDF document text
    • http://files.sportscove.com/uploads/1/3/1/4/131409090/7352003.pdfIn PDF document text
    • http://files.dynamicstillnesses.com/uploads/1/3/1/6/131637374/7774590.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/1/0433/4397/0463/files/minor_league_baseball_attendance_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7530/8193/files/4952684901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/43579060828.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_off00006d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D29 5232 bytes
SHA-256: 0d7e0f1886bd1002dd6ccb37fa190c9c87088fa6fcff826bcb9833c4c4786f29
font_01_sfnt_off00007eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EED 10316 bytes
SHA-256: 0968649d3d58b337e0699d1ba43e70a4575436bf9d47a896d0f67ea6151ca72c