Malicious PDF — malware analysis report

Static analysis result for SHA-256 25aca6185cec66d7…

MALICIOUS

PDF

46.6 KB Created: 2020-08-30 23:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52e297b51090b9b24e44e3ed2bbc6809 SHA-1: e43ad6585f408336ff9044e2f70521b67d17f2ae SHA-256: 25aca6185cec66d7277e2c89f8a65d0e974a50cb73251592e2b59075925983cb
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.ru/wix?keyword=%25D0%25B4%25D0%25B6%25D0%25BE+%25D0%25B4%25D0%25B8%25D1%2581%25D0%25BF%25D0%25B5%25D0%25BD%25D0%25B7%25D0%25B0+%25D1%2581%25D0%25B8%25D0%25BB%25D0%25B0+%25D0%25BF%25D0%25BE%25D0%25B4%25D1%2581%25D0%25BE%25D0%25B7%25D0%25BD%25D0%25B0%25D0%25BD%25D0%25B8%25D1%258F+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582'. This indicates the document is designed to redirect users to a potentially harmful destination. Additionally, another critical heuristic identified the PDF as a link farm, containing numerous external links, many pointing to 'static.usrfiles.com'. No scripts were extracted, and the document body was unreadable, but the presence of the malicious redirector is sufficient evidence for a malicious classification.

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=%25D0%25B4%25D0%25B6%25D0%25BE+%25D0%25B4%25D0%25B8%25D1%2581%25D0%25BF%25D0%25B5%25D0%25BD%25D0%25B7%25D0%25B0+%25D1%2581%25D0%25B8%25D0%25BB%25D0%25B0+%25D0%25BF%25D0%25BE%25D0%25B4%25D1%2581%25D0%25BE%25D0%25B7%25D0%25BD%25D0%25B0%25D0%25BD%25D0%25B8%25D1%258F+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582
    • https://static.usrfiles.com/ugd/b8c837_9204ea580f5f44c6bc5d9c83bcc08aba.pdf
    • https://static.usrfiles.com/ugd/40512e_aea1bd7db3e24893b118d054300c6b7b.pdf
    • https://static.usrfiles.com/ugd/c7a620_7291a30b8b5a43ef9c61157bade94023.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_00d4f4795f7c46e3bcee3635934f789d.pdf
    • https://static.usrfiles.com/ugd/b8c837_14e3c7e9331d406da9326c96fd478f5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7fa87a71fbe4767ba170fc040e573de.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_97bcefe8e9a84f90bb3398b3e9494a2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a1f5c131d9f4c5cbc50b2a8917f02dc.pdf
    • https://static.usrfiles.com/ugd/4826f5_664dc55f9bf54c0ebd782eeda9fa8893.pdf
    • https://static.usrfiles.com/ugd/b8c837_625fc9eed6064170b7865bbc90d4bb3c.pdf
    • https://static.usrfiles.com/ugd/65b209_69e73bcd125a43d5bca5481914b70d98.pdf
    • https://static.usrfiles.com/ugd/b8c837_e36b7e4a920346da937485d9921a63db.pdf
    • https://static.usrfiles.com/ugd/b7306e_f985066343f84df7a83645c276bf282b.pdf
    • https://static.usrfiles.com/ugd/fbccce_d79097d86c654c16ad3fa404399313a7.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/busuxegefopikamaposufasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/25735186061.pdf
    • https://cdn.shopify.com/s/files/1/0463/6842/4091/files/ser_bachiller.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/national_defense_authorization_act_2012.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.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_off00005d52.bin
f166ccef6e4b1b70cc2c9b65781c69cd402cd394fb80dac56804c465acdabf22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D52 5020 bytes
font_01_sfnt_off00006e81.bin
d26c261bcc1825550ec4de69dd381567b1269886366c7f3ced0e2e374aaff270		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E81 14728 bytes
font_02_sfnt_off00009c40.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C40 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.