Malicious PDF — malware analysis report

Static analysis result for SHA-256 0045bf7cb9a05786…

MALICIOUS

PDF

60.6 KB Created: 2020-10-28 14:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68aa667577c988d4f7cdc9e3f777cbe6 SHA-1: 5431f2a40bf374a3381564a2a982f16f756ac762 SHA-256: 0045bf7cb9a057864f9d7d22e9898d1d20f9fe2656874ec6fc22fcc687ca13ad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, identified as a link farm, pointing to a malicious redirector. The primary malicious URL is https://gettraff.ru/strik?keyword=criminal+behavior+a+psychological+approach+11th+edition+pdf, which likely serves as a gateway to further malicious content. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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/strik?keyword=criminal+behavior+a+psychological+approach+11th+edition+pdf
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/givukubemubibuzize.pdf
    • https://moxowikoxub.weebly.com/uploads/1/3/4/0/134096036/953a72.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f876ec31f3cc.pdf
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5f93b4875284c.pdf
    • https://xelefivaj.weebly.com/uploads/1/3/4/2/134234850/silelegaxosarelem.pdf
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/jusajo.pdf
    • https://cdn-cms.f-static.net/uploads/4386336/normal_5f93ede9f28a0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7765e084-b1a8-415c-8aed-10f6ab06880f/nojojomux.pdf
    • https://s3.amazonaws.com/ravuxudibure/figosiniruzo.pdf
    • https://s3.amazonaws.com/lunojol/prelude_bwv_999_piano.pdf
    • https://uploads.strikinglycdn.com/files/2d3afab8-596b-479c-a028-979e68907034/42417975249.pdf
    • https://cdn.shopify.com/s/files/1/0506/6607/8406/files/pbs_newshour_extra_watergate_primary_source_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0479/2909/8396/files/que_es_una_tabla_de_contenido_automatica.pdf
    • https://s3.amazonaws.com/fuwawibu/english_grammar_book_free_download_in_urdu.pdf
    • https://s3.amazonaws.com/jamokaroxoj/tutorial_dreamweaver_cs6_bahasa_indonesia.pdf
    • https://uploads.strikinglycdn.com/files/511d67eb-8e1e-4d55-a138-3030c7fb3281/dagekukivabubi.pdf
    • https://cdn.shopify.com/s/files/1/0500/1415/9040/files/joseph_roth_la_marcha_radetzky.pdf
    • https://s3.amazonaws.com/fasanag/80147232702.pdf
    • https://cdn.shopify.com/s/files/1/0499/3597/4558/files/alimentos_transgenicos_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0266/8996/2184/files/redufukudetosuwitizexaw.pdf
    • https://cdn.shopify.com/s/files/1/0496/5629/9671/files/46698194509.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab53.bin
b4645cccb5e9869c3fd0819706bf756ac6050b2fb08b6249d6dc47914f8ba223
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB53 5828 bytes
font_01_sfnt_off0000bf06.bin
8dbfda6b976766c65b939216ef3000fc0fe8c19955e65092955f2b0bfe24b051
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF06 11008 bytes