Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f4c4aa00a69710…

MALICIOUS

PDF

60.7 KB Created: 2020-08-22 14:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5448b4e5799e598d4db6d3691c471f94 SHA-1: 7f83ba5145f5025eada0aaff877106f41b76e80d SHA-256: c5f4c4aa00a6971082a83d44c640ee1cd10b53e3407e55d62ecdc0c8e9c72581
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=les+caries+dentaires+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'https://cdn.shopify.com/s/files/1/0431/9998/7873/files/lezapidum.pdf'. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to trick the user into clicking the link for a purported PDF download, leading to malicious infrastructure.

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=les+caries+dentaires+pdf
    • http://nuwojaz.njyf.org/uploads/1/3/0/7/130775823/52091.pdf
    • http://files.blog.rowlisonart.com/uploads/1/3/0/7/130739693/60be5320a.pdf
    • https://cdn.shopify.com/s/files/1/0431/9998/7873/files/lezapidum.pdf
    • https://cdn.shopify.com/s/files/1/0431/2232/7706/files/hastie_statistical_learning.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/97667864287.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/95678360721.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/carnatic_music_senior_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/jefesinuzufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/65776994703.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/tositoxoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/sipoza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/zagejaxuxuwenixivovugopek.pdf
    • https://cdn.shopify.com/s/files/1/0435/7983/4531/files/kukeko.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_off00009e7c.bin
a6a619cfdc9c999aadad98e93aa60207a4008496c1b909afc616c2c576da7f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7C 5056 bytes
font_01_sfnt_off0000afb6.bin
9d695590c36d046d146e92edf7d32cf992595e1680ffa83605491c21efa56648		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB6 18008 bytes

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