Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd88567fed726d0…

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 07:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d9acb3e24693ae9d56844536772256d SHA-1: ca2337f983260670b2abcb294a7a4bbc7e603864 SHA-256: 4cd88567fed726d001211875ad7734d8a2535edde780a7f6e185b09dad915eb5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, a technique often used in SEO spam or phishing campaigns. One of the embedded URLs, https://ttraff.com/wix?keyword=suki+ni+naru+sono+shunkan+wo+ending, is flagged as a known malicious redirector. The file also contains numerous links to Shopify and static.usrfiles.com domains, suggesting a link farm or content distribution network is being leveraged. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.com/wix?keyword=suki+ni+naru+sono+shunkan+wo+ending
    • https://cdn.shopify.com/s/files/1/0431/8173/6096/files/tivebitetuxitixi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/xaxenapinar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/pidusezar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/fuxokuvopomifax.pdf
    • https://cdn.shopify.com/s/files/1/0439/3969/2699/files/80114095478.pdf
    • https://static.usrfiles.com/ugd/b8c837_9acc212e5ff740a98d511d212432a204.pdf
    • https://static.usrfiles.com/ugd/07625c_cdcf6579314840349264e164614501aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b2aed063c5e409faa55d8d0464ea948.pdf
    • https://static.usrfiles.com/ugd/856cea_ca82c8446b364d8ab0cef051ce4b7cf4.pdf
    • https://static.usrfiles.com/ugd/1f5cef_95c69adeae314f19b86aa5b201c22c79.pdf
    • https://static.usrfiles.com/ugd/5899d5_ecdc9c4ad7e04b4a969e901f6b1e240d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b92fa0b6174c46968c8cddc0ad240f12.pdf
    • https://static.usrfiles.com/ugd/bb13a2_a690b4dea55542bd899b8acc24733841.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_off00006270.bin
5f90d800fa76f2feb2b09eec42251c28de8627c0214901f9470c91102b5c4821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 10336 bytes
font_01_sfnt_off000084f5.bin
71cd9f209c87b8b0c96ce56848fdd2428dc78587dca09384c95b7e1e7bca5186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F5 5316 bytes
font_02_sfnt_off0000970c.bin
efcb18132442cd79ca8dcefc6166fdee18699387a3385c02600adf80a32f5562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x970C 10276 bytes

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