Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cacfd63b3733283…

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 11:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f33c59f76413875c4815573a1d13275e SHA-1: 7408467a91c9cad7bb01b2beb7ca9863f4023658 SHA-256: 3cacfd63b37332833f23aceb0c55177fb5360d0fdca713431ceda99da3e99d9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'Password-protected archive lure' heuristic suggests this PDF is part of a multi-stage attack, likely intended to trick the user into downloading a password-protected archive, with the password provided to bypass gateway scanning.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/wix?keyword=zelda+breath+of+the+wild+rom+download
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/valkyrie_profile_lenneth_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/7618/0376/files/18459737126.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8753/files/masidozajipumok.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/fijodeririboba.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/interview_questions_on_sql_queries.pdf
    • https://cdn.shopify.com/s/files/1/0430/4096/4759/files/64912038976.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/botiwizunegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/dituvotulomexaredefa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/7852953074.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c63312f38c64bf080af884e03bedf1d.pdf
    • https://static.usrfiles.com/ugd/314c35_d7018a29af4247b0818fcb5df6599ce0.pdf
    • https://static.usrfiles.com/ugd/12f4eb_94995fe241e24a7db2a79042017aa8b2.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_off00005e30.bin
38bca6d518ebb16d316a89dab39bbae0bfd4ab8a8a96537cd0b3667c83cbfdea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E30 5156 bytes
font_01_sfnt_off00006fa9.bin
f96b176efd76a56732e70523c36bbb74e97c753eb84c141e6c66d2192b2ffb4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA9 10452 bytes

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