Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17253cc6531e6e2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-30 23:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 957fc3859bdcc3327650f91d52a9af9d SHA-1: 43f0fece9acaf4aaf8d7ad16d8bd97ae6a1bb886 SHA-256: c17253cc6531e6e2db2269bf0020de884c9e30515347a3b84e1020e47df18ce6
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=minna+no+nihongo'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0432/7564/9180/files/easy_english_reading_book.pdf'. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its intended content beyond the presence of these links.

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/wix?keyword=minna+no+nihongo
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/easy_english_reading_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/template_catering_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2346/5623/files/32247739091.pdf
    • https://cdn.shopify.com/s/files/1/0434/7484/5858/files/beginners_guide_to_investing_in_stocks.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0430/files/sapofaxiru.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7056/files/16331370257.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e23a41186604fdda221f1467e8a191e.pdf
    • https://static.usrfiles.com/ugd/b8c837_928da8534db641c1a63a7a9cb8334c3c.pdf
    • https://static.usrfiles.com/ugd/804ff6_e35fba1b85a8495aaea9a3559e668f38.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a260537d8644b40bfbab4801e197c7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5def78df6d9a4c24803373e69d6f63c3.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_off00005ca0.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 6744 bytes
font_01_sfnt_off00006d88.bin
3ce8dcf24277fdb64f0e3b7ba0273e94008faaf4d861529f0daba2d09f2cccec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D88 4644 bytes
font_02_sfnt_off00007d5d.bin
ac57e774cc052fd5ddd92e4b89b1f91faed11185526a8baf639e7ae77760e62c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5D 12656 bytes

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