Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49766dc139307c1…

MALICIOUS

PDF

45.1 KB Created: 2020-08-16 20:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a68c469777c64c961bb6816d0286b056 SHA-1: 6626abb610f94e0e8fa9db373d14148d7b82c845 SHA-256: f49766dc139307c1302d61da9c4bb97580c96835c885e524d7a3fbaf74fb3808
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on Shopify, likely to improve search engine ranking and lure victims. The ML classifier strongly indicates maliciousness. The document body contains obfuscated text and embedded URLs, including the primary malicious redirector.

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=cateye+velo+8+manual
    • http://lamufonu.usopkc.com/uploads/1/3/2/3/132302782/897d7e29b9.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/jonajafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/60981914199.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/kitchenaid_superba_oven_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/kosibudulajapofitiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8247/files/mitajorabavukukosiwarusap.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/70289495538.pdf
    • https://cdn.shopify.com/s/files/1/0454/7251/4206/files/61611161513.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/52038102934.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/wugojugiviso.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/safari_online_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/76356357841.pdf
    • https://cdn.shopify.com/s/files/1/0435/6423/6968/files/how_to_share_a_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0451/8169/8199/files/day_by_day_armageddon_beyond_exile.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_off000064f2.bin
4aebae856e23904749358f4a411105330cc359361d092bb31e11692121cd395c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F2 4772 bytes
font_01_sfnt_off00007528.bin
e9a9931b06569958d775b75c9e39d73145cdd128f627b037b8ec9819b3912c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7528 10672 bytes
font_02_sfnt_off00009960.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9960 4324 bytes

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