Malicious PDF — malware analysis report

Static analysis result for SHA-256 55521669f3a5a409…

MALICIOUS

PDF

43.5 KB Created: 2020-10-05 01:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d2bfd9308f6ea78817833608737613c9 SHA-1: 95edcddc36b39619fdad1cf4ef2c69e309bf8bb4 SHA-256: 55521669f3a5a409ade43f80cdab093f58a918706da46f07d2153bbc4d9cfc83
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=drawing+fruits+and+vegetables+worksheets In PDF document text
    • http://vugir.2binspireddesign.com/uploads/1/3/1/3/131380213/tijobimalosajalivew.pdfIn PDF document text
    • http://befovu.dralisonpt.com/uploads/1/3/1/4/131406352/4de741ef8.pdfIn PDF document text
    • http://gibex.baristascoffeetea.com/uploads/1/3/1/3/131382382/vevabetaxam_lusituzijiku_zevizurasararaz_mupujupox.pdfIn PDF document text
    • http://files.arijadehairandmakeup.com/uploads/1/3/1/6/131636927/lejix.pdfIn PDF document text
    • http://files.undercoverchefs.net/uploads/1/3/0/7/130776594/jisawitodinuma.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/pipivunupemazigipiwuwiji.pdfIn PDF document text
    • http://kakesem.sherconresort.net/uploads/1/3/1/6/131606938/wutewabebudelowim.pdfIn PDF document text
    • http://files.cowgirlcoutureny.com/uploads/1/3/0/7/130776167/xibitagirake-wavoguporomazo-rijolil.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/1/0492/9837/4815/files/ftl_smoldering_engi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0255/1716/files/cricket_hollow_zoo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/xuledanudal.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_off00006c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4F 5524 bytes
SHA-256: 72b5bc74b67ff7bff820bdf20876169ea82cf6bb1348ee450156c514d0249d42
font_01_sfnt_off00007f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F31 10108 bytes
SHA-256: 1d422db4896f81daff169606495e0a2753915039f44f0c2c85c8e700012cf79d