Malicious PDF — malware analysis report

Static analysis result for SHA-256 384e8a3e44f90a40…

MALICIOUS

PDF

42.3 KB Created: 2020-10-06 21:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: bfec94c6b816a2ca58566ff536d7b5f7 SHA-1: e2f144689c5483ff4905e07737e246afcaeeadb0 SHA-256: 384e8a3e44f90a402b18875b319040793d5a669e346a309f7a793f0c37c90c57
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://ttraff.link/pify?keyword=letter+from+birmingham+jail+answer+key In PDF document text
    • https://site-1043829.mozfiles.com/files/1043829/walojawetipigamu.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/lokumile.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/pejigik.pdfIn PDF document text
    • http://files.halltosuccess.com/uploads/1/3/1/3/131384359/zeruwakalubelekik.pdfIn PDF document text
    • http://files.philaeshriners.org/uploads/1/3/0/7/130776246/vazafoxuruwamo-makaj-wisozewefepawev-zutefarop.pdfIn PDF document text
    • http://reguzo.atriumcarpark.co.nz/uploads/1/3/2/6/132682871/038ee61d48e0f0f.pdfIn PDF document text
    • http://files.spiritualdirectionminstry.com/uploads/1/3/1/4/131454670/bb43fb305d0.pdfIn PDF document text
    • http://files.spaceclubgolf.com/uploads/1/3/2/6/132683062/kobenewunefubosini.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/1/0484/3664/1960/files/the_genial_gene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0774/4666/files/lonely_planet_italy_travel_guide_download.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_off00006705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 5596 bytes
SHA-256: 34af111cec9e07dd5f90f3b3b92a9c278e4bfa61c1161ab366932dc1b8265215
font_01_sfnt_off00007a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A06 10068 bytes
SHA-256: 839cf25f113a8547b8b37611e8bd2a15eb4e568fe5034d0eef19288a56b27719