Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd58777508c0a3d…

MALICIOUS

PDF

35.5 KB Created: 2020-10-15 23:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 28a32c646b35b03b511e9489b65037d7 SHA-1: 272a0c18f42d87965fb5538f572cd8ca5c3ee108 SHA-256: 3cd58777508c0a3dfcf5748581b596869a59e5411253bb070c66de1d2a558da9
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/123?keyword=japan+travel+guide+for+tourist+app In PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/bamukumixuv.pdfIn PDF document text
    • https://xirofepomare.weebly.com/uploads/1/3/0/8/130814083/6615089.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/577239.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://site-1043908.mozfiles.com/files/1043908/59069581102.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/34158706597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f883d93989d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8779957658d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f8823f8c6213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f87418c156fd.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/1/0428/7909/0854/files/55634405467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0312/4375/files/buckhorn_creek_elementary_school_holly_springs_nc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7276/5083/files/mubedevomifimobusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/ramisova.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_off00004d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D05 5256 bytes
SHA-256: 140d64ddcd0510b6b316f8a4b23f8c877075b13892ec01ac464591c666f84bc6
font_01_sfnt_off00005efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFA 10040 bytes
SHA-256: 88dc350ca88010556e3eff65a707eb0ade86e5b8c6fb7f3350713c88c9292037

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