Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e3e3d4d6b7e154…

MALICIOUS

PDF

36.8 KB Created: 2020-10-08 09:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0f9f6375f657280715691d0f132c80df SHA-1: 4b522ff6d84838877e408b02f87f3b7a157fef00 SHA-256: f3e3e3d4d6b7e1542a2919a9b6cfd7f21b97d69bbacca16e5a4a106a650f2b76
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=sujok+acupressure+points+chart+pdf In PDF document text
    • https://site-1043204.mozfiles.com/files/1043204/porutarutawigezufirigu.pdfIn PDF document text
    • https://site-1039305.mozfiles.com/files/1039305/zidonujodarasafif.pdfIn PDF document text
    • https://site-1039257.mozfiles.com/files/1039257/74522634763.pdfIn PDF document text
    • http://labek.philadelphiaprek.com/uploads/1/3/0/8/130814526/4502070.pdfIn PDF document text
    • http://files.propabilia.com/uploads/1/3/1/6/131637020/7648061.pdfIn PDF document text
    • http://files.stspeterandfevronia.org/uploads/1/3/0/8/130814448/c272a3a93dc1277.pdfIn PDF document text
    • http://zowopuri.clearcreekbands.com/uploads/1/3/1/3/131380467/1675444.pdfIn PDF document text
    • http://gajitub.misterszymanski.com/uploads/1/3/1/6/131636879/930e4b6.pdfIn PDF document text
    • http://gekapelej.skylinehills.org/uploads/1/3/1/3/131383309/4456301.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/1/0431/1177/6416/files/89921244202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5703/6968/files/26146047841.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_off000052f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F4 5456 bytes
SHA-256: 4b3faf8d7dca3f533ca1dcc632e54a68182a580e5e24215ee95511b2a29de431
font_01_sfnt_off00006582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 9732 bytes
SHA-256: 090bff848b154d0939791db8a6a47671bab026396816ac07d1a1571fb89a7c07