Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae364d33f2de7aca…

MALICIOUS

PDF

48.5 KB Created: 2020-10-27 22:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0a216626a7bae36805d166392ed4315a SHA-1: 514f7215d71390773495f98385d72d1333a545ec SHA-256: ae364d33f2de7aca2205d63e8cb3c59aef457c8f4d46f358f7904a7cd0030efa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. Additionally, the PDF_SEO_LINK_FARM heuristic suggests the document is part of a link farm, likely for SEO manipulation or to distribute malicious content.

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 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.
  • 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=the+great+gatsby+chapter+7+study+questions+answers In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/kaduparaje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuxadol/futogu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/pifajatefowi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/mimewagev.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/kuritazasosug.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/kewewanaso.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/california_immunization_card.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/82307874937.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/xejiwatufigulukorefil.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/cogic_statement_of_faith.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/babylonian_religion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7839/5080/files/fidutusodokabapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/50483049751.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/ancient_history_book_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/91125969828.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/nuance_power_at_least_one_signature_requires_validating.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/86409986335.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6B 5676 bytes
SHA-256: 611dcab36622b2c06fea384a84085a9401ac9c6affb5c57c490796c4ebbd5361
font_01_sfnt_off000080bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BC 11428 bytes
SHA-256: c3895e14cef8f619c7b5f3d0c9d0e576840b5a845b03f4c967cc6b76403b2044
font_02_sfnt_off0000a6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6AF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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