Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba8ff705029b8d2…

MALICIOUS

PDF

39.2 KB Created: 2020-10-05 09:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fa5367c11fc144ce7da7c99dd8e7e285 SHA-1: fe511bc75ebc22898c083564e30d5669af1b3145 SHA-256: bba8ff705029b8d2a9bc8365942161a77a8fbb162489e72083f67bc19a3320fc
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://cctraff.ru/strik?keyword=my+toddler+talks+book In PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/gepimoniri.pdfIn PDF document text
    • https://site-1038995.mozfiles.com/files/1038995/biromalazokuxogevid.pdfIn PDF document text
    • https://site-1039950.mozfiles.com/files/1039950/vafibegomixajanaxa.pdfIn PDF document text
    • https://site-1040663.mozfiles.com/files/1040663/fobimojexuzatatukaxoloz.pdfIn PDF document text
    • https://site-1043668.mozfiles.com/files/1043668/lowuvej.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/xepuro.pdfIn PDF document text
    • http://files.salem-saukvalleychurches.com/uploads/1/3/1/8/131872185/vujolelulaxapiz.pdfIn PDF document text
    • http://rakewoneg.bucketoblood.com/uploads/1/3/1/4/131437601/7746027.pdfIn PDF document text
    • http://telenije.lightfactorystudio.com/uploads/1/3/1/3/131379552/rupiwikubexixu.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/1/0499/9666/0886/files/persona_adachi_dungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6153/8727/files/blythewood_high_school.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_off00005ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCB 5132 bytes
SHA-256: 7be24df8e1c0b2e747e760fb0bcb3248b5050403f526c61694bf2b8c56196e8e
font_01_sfnt_off00006e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E57 9940 bytes
SHA-256: 7f96556d4a00bccf45a0b812e99e5373a83e26a6bf85781be8de32b64f502c54