Malicious PDF — malware analysis report

Static analysis result for SHA-256 9561026a46050716…

MALICIOUS

PDF

35.3 KB Created: 2020-08-31 12:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85354f6b9d2712d013936ab92590dc32 SHA-1: 74888dc23c721aa48a2026ff0ea5f4c2bb1797e6 SHA-256: 9561026a460507162e92c491cf1d0e992f8b2e5f32d5d461d514881cdccad945
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on static.usrfiles.com. One of these links, https://ttraff.ru/wix?keyword=mr+doody+song+lyrics, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure through a link farm tactic. No scripts were extracted from this sample.

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=mr+doody+song+lyrics
    • https://static.usrfiles.com/ugd/b6bf5b_5348981b3ed54418bbcb200fd5e7cc4b.pdf
    • https://static.usrfiles.com/ugd/0286dd_3bd5af34f14841a6bb0dbdb0e1f6a838.pdf
    • https://static.usrfiles.com/ugd/45e30f_7c8fa8ad98d244d5ac2cf25accacf3d2.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_f0649d598ec3477fba6c4794fcafcdeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_98e279dc3146423d9d3f09a5c0db0f5e.pdf
    • https://static.usrfiles.com/ugd/09273f_1a335514272e4a03abf401b96f36b5a7.pdf
    • https://static.usrfiles.com/ugd/aef5b7_091a890eb80744fdbc871dddc25c05b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_71abadd34b074b6fbf1a82c59012821b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f430eee9e9b442993b1fc04c3d562ac.pdf
    • https://static.usrfiles.com/ugd/0cd019_de0cf38b48fb4fa598b82e7da1e4ee11.pdf
    • https://static.usrfiles.com/ugd/4d400c_4cfe627bcc034724aefd21e092b18b25.pdf
    • https://static.usrfiles.com/ugd/d1d005_54b9e7998b6549d8a8fe1f415c97bffe.pdf
    • https://static.usrfiles.com/ugd/0d2908_8cfc9ab555a34ac1aa35873fa84b0686.pdf
    • https://static.usrfiles.com/ugd/eb4c03_19e6a63611e5404882ec60877f906a34.pdf
    • https://static.usrfiles.com/ugd/2f07a1_78b5538679b74762a55de3ef51cb2e74.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcc7154879c54b6fb5fc82c3978ee8bf.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_off00004c0b.bin
9c4193eaa4ebf4232feaa5b7ca8e35a55ebb049498e95f69b843e4a710a95ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0B 5004 bytes
font_01_sfnt_off00005d37.bin
dd55e4999cef5e4f96fef7236940de98b40155765af7e3c3167afa39cc49560d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D37 10304 bytes

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