Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7b7e7feb0a3905…

MALICIOUS

PDF

35.9 KB Created: 2020-09-04 21:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f43a8600e8fcc549a6eb2f266b53605 SHA-1: 2b650ad3b2816725e4bab624109af23baadea1b0 SHA-256: 3f7b7e7feb0a39054b5306c6a5be290f79bd3caeda45ff8acf729fc3d211fb91
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=sims+4+basemental+drugs+mod'. This URL is presented within the document body, suggesting a social engineering lure related to 'Sims 4' content. The presence of a password-protected archive lure heuristic indicates a common tactic to bypass security controls. The file also exhibits a PDF link farm heuristic, with multiple links to external PDFs, some of which are hosted on 'static.usrfiles.com'.

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.me/wix?keyword=sims+4+basemental+drugs+mod
    • https://static.usrfiles.com/ugd/e23fbb_68e5629d87f6455c9fa8f7bfba1b5c69.pdf
    • https://static.usrfiles.com/ugd/81d6a4_ae78e795a6424c94be28be1beaba2007.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_10021b9dcab7426ea438ac54c688d578.pdf
    • https://static.usrfiles.com/ugd/fd30ac_1ddb02c01a414c659a0084fc61e6fbdc.pdf
    • https://static.usrfiles.com/ugd/47e66e_abe90922a8f94867bb53cdf9e9d17905.pdf
    • https://static.usrfiles.com/ugd/4aae87_e83dec4950d9432082fa43ce6e934c80.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/acknowledgement_format_for_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/1647/9132/files/35667672197.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6226/files/problem_based_learning_lesson_plans.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/cambridge_english_in_mind_workbook_3_answers.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_off00004e14.bin
5af103e853cab40ac16ce57dcea0f89a04f81c6f884b1cab73fc6f827c08fa52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E14 5476 bytes
font_01_sfnt_off00006097.bin
9e6e58a26567ee8e30f24acc3f2243379b47bda8f57ec2f9f60a399aabc474e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 10276 bytes

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