Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb8769423418a29…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 17:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64fb4ff67f9993d8fd1e4671cf4f0f3d SHA-1: 90cf87956b83388661da9690397a9902d4f05c84 SHA-256: cdb8769423418a29f47f7269c4e66322c2c92b5ff38ec06020a6a6d81734eaf4
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. The presence of a large link farm and a malicious redirector suggests an attempt to either distribute malware or engage in SEO poisoning, potentially leading users to malicious sites.

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=faulty+comparison+exercises+with+answers
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/300_blackout_reloading_manual.pdf
    • https://cdn.shopify.com/s/files/1/0463/2536/6945/files/34692821337.pdf
    • https://cdn.shopify.com/s/files/1/0464/9487/5800/files/how_are_basalt_columns_formed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://static.usrfiles.com/ugd/b8c837_019a09f021114217a5f58feee6ad44b6.pdf
    • https://static.usrfiles.com/ugd/912de2_2d3355dd7a1b40bc9d815dd1c501422e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cd78ef61c8b4b4a890cdbd5784aca72.pdf
    • https://static.usrfiles.com/ugd/5cf23b_1c3f5d5e47a944bd8562abb722051def.pdf
    • https://static.usrfiles.com/ugd/83b1b3_4a99d8e2dd8c4e8ba8c466e9b551fa6e.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_04db0fabe7f1416eb358fd625d10d639.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc382d467c754a869cd3d621bcb08ec2.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/angina_prinzmetal_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/fikabegasop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dilos.pdf
    • https://cdn.shopify.com/s/files/1/0452/6276/6242/files/70851527876.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/8._3_medians_and_altitudes_of_triangles.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_off00006d24.bin
a9532c6af8b6415596cb24f97fc0ec7e6464fe8670ace31d10868625c6e6280a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D24 5388 bytes
font_01_sfnt_off00007f69.bin
c57b21c8db5982d8482e6dffcf2f0121f4c803f9d9b21295472f88195bb1d165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F69 10300 bytes

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