Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3917e792b9c0bc…

MALICIOUS

PDF

43.4 KB Created: 2020-08-13 22:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3369da598d83c9d238f6eb44faa8135 SHA-1: 7522e107104655737f771773fb3af1bf2eeaba11 SHA-256: 9e3917e792b9c0bc9cd040318698bb7072c9f307d494f6a35bbd27f18e4c1c50
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, likely for SEO manipulation or to distribute malware. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of numerous links suggests a delivery mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=2019+construction+company+profile+pdf
    • http://difix.sweetdreamsthykingdomcome.com/uploads/1/3/1/4/131454731/zanepusiroxusuvorer.pdf
    • http://files.frunkpuppyshop.com/uploads/1/3/1/1/131164569/33567c00ae93.pdf
    • http://vefukaf.tipifarfelu.com/uploads/1/3/1/1/131164250/2304768.pdf
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/josijinogedogajasakajese.pdf
    • https://cdn.shopify.com/s/files/1/0433/9957/7756/files/majekuzexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/ramen.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/united_airlines_gate_information_sfo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9087/8372/files/programma_centrodestra_elezioni_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/99123690282.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/jujasafutop.pdf
    • https://cdn.shopify.com/s/files/1/0440/0473/7174/files/dumiku.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/banking_operation_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/39436644827.pdf
    • https://cdn.shopify.com/s/files/1/0450/2195/4206/files/oregon_wine_country_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/administracion_financiera_gitman.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f8.bin
af55551e2702cb3f2a63e4c904778af6b5a46d82fd685b47a4bf9a087e727a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F8 5788 bytes
font_01_sfnt_off00007c8f.bin
1a203c2ebef0e610d5f3f9ddd48735d1a34c0880f64fe3dde1ac1fec632da20c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8F 10500 bytes

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