Malicious PDF — malware analysis report

Static analysis result for SHA-256 9847b4ab889c8307…

MALICIOUS

PDF

49.3 KB Created: 2020-09-02 00:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4675e0f7e09dd3aaa1fae690ca48253a SHA-1: 1d121b0b51f298235e9afe181660a17a2782116c SHA-256: 9847b4ab889c8307cce6001ced1d2ff289e24c7aa4be4a19422056f32ac4726d
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'activity sheets' and the malicious URL. The primary heuristic indicates the PDF links to malicious redirector infrastructure, suggesting a phishing or malware delivery attempt.

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=activity+sheets+for+first+day+of+school
    • https://static.usrfiles.com/ugd/5de1df_44cdc0e0c5954646a07e38af62e9554c.pdf
    • https://static.usrfiles.com/ugd/b8c837_595645a606b9452192fa9041e802d36b.pdf
    • https://static.usrfiles.com/ugd/a4e402_e01d4587838d4685b4572182e77a9c72.pdf
    • https://static.usrfiles.com/ugd/f35da0_8cbae62c168e4c09873454ae343a5a3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1cdf3af50a24550a7da75f8f6ac57c8.pdf
    • https://static.usrfiles.com/ugd/3bf302_d32efc208308432a93635e2d148ce3df.pdf
    • https://static.usrfiles.com/ugd/1d64af_7123143a70664c10bcd842f49a620900.pdf
    • https://static.usrfiles.com/ugd/fe83c3_fafb3ce136b6436d8db3a6937139fe0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a68c19e79ac14cc0a1bd0bc883cb7970.pdf
    • https://static.usrfiles.com/ugd/02af14_ad1b0a75268841458d2137019d53b134.pdf
    • https://static.usrfiles.com/ugd/13ae68_2c8244ff79e44809a2a1c8a202d57330.pdf
    • https://static.usrfiles.com/ugd/12745a_a06e2da8b1f94c7f82859ee1b26eeabc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddbbd5f0e68a4e4d8a973a8d228d58dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7cd55585e554314b7a15843aa122d0f.pdf
    • https://static.usrfiles.com/ugd/4fb05f_0ad0563f0aab4978940e19c3a12abc4b.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_off00006ba8.bin
a12ebe6f0991fe2efa005758fb19bfc4630f45e05bc93d21688883f91a77b92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA8 5260 bytes
font_01_sfnt_off00007d9b.bin
33483fc626bf6cb92f1c7ab849b3599aec36e8615a59071daf6a939e8ebe6269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9B 10016 bytes
font_02_sfnt_off0000a01f.bin
b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA01F 16312 bytes

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