Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee357fa56fb40983…

MALICIOUS

PDF

44.3 KB Created: 2020-08-20 01:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4586325078bcbbc15cfddb419c397f4d SHA-1: 90d39f0fc7a23d63d097c88f1aefe5b07884cb9c SHA-256: ee357fa56fb40983f0babc0e5b4c05b0861bfa7fbe98d1ffb88668d44e896d99
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.ru, which is used in a lure for a 'cursive worksheet generator'. The document also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains. The primary malicious IOC is the ttraff.ru redirector URL, which likely leads to further malicious content or exploits.

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=cursive+worksheet+generator+free
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
    • https://cdn.shopify.com/s/files/1/0434/1628/9447/files/zowaleneguluza.pdf
    • https://cdn.shopify.com/s/files/1/0450/2165/9286/files/pdf_splitter_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/funejuxujudabasilonali.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/15079498563.pdf
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/xagisagitixepapilikopofab.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/gedomubazanilojav.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/vosadixegoxusim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/noxazur.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/yolanda_sald_c3_advar.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_off00006fd1.bin
67c81de07bf6fc658d94b3b046d35983d12b72de79321a80c4a62af5a817f9c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD1 5120 bytes
font_01_sfnt_off00008153.bin
0985df83226a65cd6e605d288b941120a6d7085ad56dd7dbfc8e4e260621c81b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8153 10396 bytes

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