Malicious PDF — malware analysis report

Static analysis result for SHA-256 37563df92739e840…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 18:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b5adefaf847e4fa31e36fb72c171ac4 SHA-1: ceeed766fdec4935ff56b1b0c051cb31761e20c8 SHA-256: 37563df92739e84046f63228eefcbabdc56f940e9b8909dae13f9fe1cf6fc059
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One prominent link, https://ttraff.ru/wix?keyword=poweramp+full+apk+cracked+free+download, is identified as a malicious redirector. This suggests the document's primary purpose is to direct users to potentially harmful content, likely for software cracking or other illicit downloads.

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=poweramp+full+apk+cracked+free+download
    • https://static.usrfiles.com/ugd/b8c837_f702f7ca07b3449f80b3d98b7fa04ab3.pdf
    • https://static.usrfiles.com/ugd/f84671_d4b9703d8afb4397bb7bfa35787233b0.pdf
    • https://static.usrfiles.com/ugd/067ecb_c375d74933de40c892fec3406e410b17.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1480/files/apunkagames_gta_vice_city.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb1e6880f2654da2884085ebdeb17af9.pdf
    • https://static.usrfiles.com/ugd/3e87bf_0ff2e1436be7420e871db18dd82d05a6.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_c53027d041af40f3ba75b4d92ea68b78.pdf
    • https://static.usrfiles.com/ugd/b8c837_464caf8764254d4f9b7d54c1c6813de3.pdf
    • https://static.usrfiles.com/ugd/374ce0_24e44ba9bb864fccbdcb4f9605ef8640.pdf
    • https://static.usrfiles.com/ugd/b8c837_222deceaae0748d1927b6cf8a0228f86.pdf
    • https://static.usrfiles.com/ugd/b8c837_6919ffb555e6458f9eca6a2dadef92d9.pdf
    • https://static.usrfiles.com/ugd/739437_9c2e044e9e7f4063a7e6c9be4d8fb362.pdf
    • https://static.usrfiles.com/ugd/b8c837_34bfc55053e041deb60ee9458944597e.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_off00006e47.bin
0d38f2bd6a636b409bcef8a5a2bd736c7574bc4b119a37603672e98ceb9124d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E47 5280 bytes
font_01_sfnt_off00008037.bin
8fef20cc7d71044cd4e51e6ba2d0ed400663dbb7bd5afcc467bdb820787dc6cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8037 10308 bytes

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