Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc605379daa3728…

MALICIOUS

PDF

80.7 KB Created: 2020-08-24 11:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a888ae064bc47d1490e28046cc4ce91 SHA-1: ad08b617a73a28066d4237a2809038f54159c849 SHA-256: 5cc605379daa37284f90f46bd50250bb0b88153d8cf7e285f0244133d949325a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful websites.

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://ttraff.com/pify?keyword=gauge+transformation+of+electromagnetic+field
    • http://files.ruthbeckett.com/uploads/1/3/1/4/131437106/boledepose.pdf
    • http://files.everaftercharacter.co/uploads/1/3/1/4/131483344/luleguwu.pdf
    • http://vivem.danielleleefphotography.com/uploads/1/3/0/9/130969360/kozeripamibupa_dobofutaxamab_gisowigiwagesux_repabubave.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/heroes_rise_the_hero_project_achievement_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/15621122398.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/96028981926.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/2634695662.pdf
    • https://cdn.shopify.com/s/files/1/0440/2040/0286/files/arendt_banality_of_evil.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/35384391030.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/82030439235.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/baixar_em_gratis_livro_de_romance.pdf
    • https://cdn.shopify.com/s/files/1/0449/4236/0744/files/automobile_engine_parts_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/jozexagajixurofaxunodur.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_off0000f36d.bin
c8f2fff4e9956bb8754e12220b51df041d7b8d690b540abb4856ef640bc0e8b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 5372 bytes
font_01_sfnt_off00010599.bin
a7bcc94c94fe9095501da289f835f2841a3e919f167f3701745c7b8accb1fd9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10599 15448 bytes