Malicious PDF — malware analysis report

Static analysis result for SHA-256 824f9affa3e30771…

MALICIOUS

PDF

37.8 KB Created: 2020-08-19 11:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c897e01d47b2058b4c54d17a3ee43cd SHA-1: 1cf07dea187095ecc73492a4a6d10bac076ff452 SHA-256: 824f9affa3e30771b840bfb438fe9c9faefc7f0c790cd657add78b0996f322d0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to appear as search engine results, with one critical link pointing to a malicious redirector. The document body text, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=descargar+angry+neighbor+3.+1+apk', suggesting a lure to download an Android application. The presence of numerous links to Shopify-hosted PDFs indicates a link farm strategy to improve search engine ranking for malicious content.

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=descargar+angry+neighbor+3.+1+apk
    • http://files.uqpalaeo.com/uploads/1/3/1/0/131070938/c19d9ce5.pdf
    • http://files.theatelierllc.com/uploads/1/3/0/7/130775707/gotugilurewosinak.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/bauer_bodoni_ef_bold_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4835/files/42767850673.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3091/files/arquitectura_barroca_en_francia.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7055/files/lopekuribopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/48126880216.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3124/files/binary_search_tree_implementation_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3511/files/pdf_auditoria_de_sistemas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/25640547066.pdf
    • https://cdn.shopify.com/s/files/1/0432/0103/6443/files/ballade_pour_adeline_original_piano_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b39.bin
53769e781268b6b53cf34bf53819511f5f5710d156fb407c92f87b0328dcdfb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B39 5716 bytes
font_01_sfnt_off00005eb0.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 1800 bytes
font_02_sfnt_off0000673d.bin
2207621f1b1e1edcd09c58089b80bf09765cf52bd91ebec9ba00f58a4c75d68e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 10280 bytes

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