Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcc73740c71a7ab…

MALICIOUS

PDF

43.2 KB Created: 2020-09-30 17:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-20
MD5: 820fc53aef8bd67d01e927d0ada11880 SHA-1: 1a6d16f6ef0f73c05fc7120e3ccffb751f0e2755 SHA-256: 3bcc73740c71a7ab912535100331bfe1dfeb6daa8bd9c6e05f1a071cd90213be
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://ggtraff.ru/strik?keyword=high+school+reading+comprehension+worksheets+pdf In PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/9553588492.pdfIn PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/dolewujodujegu.pdfIn PDF document text
    • http://fovadimo.thewildmystery.com/uploads/1/3/2/3/132303052/2598869.pdfIn PDF document text
    • http://files.bpstis.org/uploads/1/3/0/7/130776822/wasopij-kemesuz-popesebul-kokefika.pdfIn PDF document text
    • http://files.tarinarosesocialmedia.com/uploads/1/3/1/1/131163859/0a15cdf07142e4.pdfIn PDF document text
    • https://site-1036907.mozfiles.com/files/1036907/95627352138.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000068dc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000068dc.bin)
    • https://uploads.strikinglycdn.com/files/92f36316-4cc6-4161-83db-52c65cbef1cc/39178149244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e684be1-8cdf-4064-bb77-67da879a2caf/13268763115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6c145e-91aa-4def-9434-ecb372f01999/32443419715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/61522629637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/jivulebafux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/vagonepujezexodopibowivi.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 extracted file (font_00_sfnt_off000068dc.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DC 5684 bytes
SHA-256: 8afef070fda64f0f057fa70e346bf2bcb245bb03b9ab41685dd899599d99bcb1
font_01_sfnt_off00007c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1B 10336 bytes
SHA-256: f7ffe8670f4290d9d26ba26d41cfa7b5c1254abbfac34b9db0eaf4a73241f41e