Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf14dcfc24499ce6…

MALICIOUS

PDF

44.2 KB Created: 2020-10-01 17:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b8fedf9107ce791fa561e3927902a1e1 SHA-1: e6143cf5331377a33b2516136a84450124bacf26 SHA-256: cf14dcfc24499ce656e604a6683fc670545de19ff851a01d5a5005d517730064
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=arithmetic+and+geometric+sequences+worksheet+answer+key+pdf In PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/50222680125.pdfIn PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/mamijijudogazewadovix.pdfIn PDF document text
    • https://site-1040609.mozfiles.com/files/1040609/zifiwukitumezewileb.pdfIn PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/57525913182.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/43843864926.pdfIn PDF document text
    • http://files.vin-services.com/uploads/1/3/2/8/132815359/xazobe_jixixelofe_mopozubejagujix.pdfIn PDF document text
    • http://dalag.weedfreeltd.net/uploads/1/3/1/4/131406062/bazaredesoroxeb_powejusoparosam.pdfIn PDF document text
    • http://files.jam247sound.com/uploads/1/3/0/9/130969543/3303745.pdfIn PDF document text
    • http://files.autokonnect.com/uploads/1/3/1/4/131410662/sekuruluzun.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/1/0433/7811/4727/files/22085882586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4114/0131/files/human_population_growth_activity_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5489/1161/files/58467531521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63993eb0-0524-469b-8f9d-1deb00f20954/tufexiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f789993-a34b-4c18-bc5b-5f0c783b8d29/75214121105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ea21d7-ecbc-48c3-b1b8-97ff4e414573/78807829100.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_off00006a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A90 5912 bytes
SHA-256: bbb065163888daa0471ae372612362420201c26f989a54354cc47403984783eb
font_01_sfnt_off00007e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9B 10728 bytes
SHA-256: 6a3e89c259316f4e8095e5a5ce957f3b2a2bb857ac630424b4c8233923f8ed92