Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a8d1b91b27cb2e…

MALICIOUS

PDF

42.0 KB Created: 2020-09-29 20:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b50a189c62be7e4e234d698fc4cc7871 SHA-1: f9ada41d223c2ff17d039c755eaa3a2e102ea1b2 SHA-256: 18a8d1b91b27cb2ef3963db8db17347e4b9098a83c9c3034ac0244569e33cae9
132 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=buprenorfina+parches+pdf In PDF document text
    • http://files.celestechristieart.com/uploads/1/3/1/4/131453998/muwuzixi.pdfIn PDF document text
    • http://files.thewheelcaravanpark.co.uk/uploads/1/3/1/0/131070192/tujuwunote.pdfIn PDF document text
    • http://files.lwmphotography.co.uk/uploads/1/3/1/4/131410685/kukitifizija.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/32552572662.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/nevanokixivilad.pdfIn PDF document text
    • https://site-1037894.mozfiles.com/files/1037894/newokevevogaderuzamewemar.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/rababikanamunabosadeve.pdfIn PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/77054521962.pdfIn PDF document text
    • https://site-1037900.mozfiles.com/files/1037900/63158824029.pdfIn PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/61514803364.pdfIn PDF document text
    • https://site-1036981.mozfiles.com/files/1036981/30979474992.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005be5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005be5.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00008daf.bin)
    • 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 extracted file (font_00_sfnt_off00005be5.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE5 5064 bytes
SHA-256: f9dafc545474328f67bd89ead8cf0694e513144c28ef1e26971c9186defc9f1a
font_01_sfnt_off00006d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D06 9548 bytes
SHA-256: d18ed0c9111c704061a74e8aa765ce21472d050c7569d37769e23d16a137baaf
font_02_sfnt_off00008daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c