Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4bff7dc9d94b88…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 03:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a807d384819d78d0b869d5a23cd25270 SHA-1: f7e7bf7dbc7e895ffb9b41d689e9c614de9235a6 SHA-256: ff4bff7dc9d94b883e1cd48311db1e7c49179e839cf9675266cb6271c514fe16
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a lure for a game mod. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic fired, pointing to the URL https://ttraff.ru/pify?keyword=game+burnout+drift+2+mod+apk. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a link farm for distributing 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=game+burnout+drift+2+mod+apk
    • http://xeleke.sailabilitybatemansbay.com/uploads/1/3/2/6/132696067/e3894.pdf
    • http://zutotaf.rkspeech.com/uploads/1/3/0/8/130874030/wetizudobilu_vemib_domuxon.pdf
    • http://files.antiquesdiary.com/uploads/1/3/0/7/130775607/5d145185a86fb4b.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/jidiwalo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/31068001269.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/rotuvid.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/pobobunujenusikek.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/bible_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/lobuberesisetamoli.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/75003957416.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/velelebebofasedonakudimed.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8701/files/best_sewing_books_for_beginners.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_off00005f46.bin
16e7d0457dc07b763afc0999c8dd75fd6406fbb111ab565e9f135938f694b44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F46 5344 bytes
font_01_sfnt_off00007168.bin
4f34da95aa6385c33b97d128652afae7c43e3628915a7a4522d8ce4401bc06a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7168 10588 bytes

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