Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fe99ab23dd97bc…

MALICIOUS

PDF

33.7 KB Created: 2020-08-04 22:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fe814177c4f1f346b7a70cabd8e60ff SHA-1: b6e8a841ba9174f65be4ec93f4f8c46e875abaa2 SHA-256: 59fe99ab23dd97bc92c736a72211932a4283496c54a37a439995c11e3cd4e00f
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating it's designed to lead users to harmful content. The primary malicious URL is https://ttraff.ru/pify?keyword=biodegradable+plastic+pdf+download, which is likely used to redirect users to a malicious payload. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a social engineering lure.

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=biodegradable+plastic+pdf+download
    • http://files.pen-2-paper.co.uk/uploads/1/3/1/4/131438323/tunifu.pdf
    • http://files.tyrendarraagriculturalshow.com.au/uploads/1/3/2/6/132695525/suwilafalutive-jusezopikuwajev-lefok.pdf
    • http://voxiwog.alittledevotion.net/uploads/1/3/0/7/130740025/46df5a9d0e4a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/7144095448.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/phn_mm_chuyn_file_nh_sang_min_ph.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/76178168937.pdf
    • https://cdn.shopify.com/s/files/1/0434/3758/8646/files/98413028252.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/vepifabosudosolukupemodo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/24731744896.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/99363732415.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/41170575998.pdf
    • https://cdn.shopify.com/s/files/1/0435/7865/4883/files/vurizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/zuxilarudamidiguna.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/megaman_battle_network_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/zololufofafoginipegifaba.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_off000044a5.bin
aec4f03bb246d61196c278aaf6818777b4be3b1f7cd1734e2938ee1c6ab3f34f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44A5 5604 bytes
font_01_sfnt_off000057d5.bin
07adedf34c22b049af28e2a88f5c3c88a1b66c1a08aa18a6e506745f2a985875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D5 9864 bytes

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