Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ded7bd23c1e805…

MALICIOUS

PDF

49.4 KB Created: 2020-08-29 21:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aa55ddf130aa2ec634ca6d9bca156c5 SHA-1: 3828c14a3b0590322ab67c6bffad213ad97c42b5 SHA-256: 35ded7bd23c1e805923499e033e31e6c74d42cd68aaa75259b6c8bf848f9d915
120 Risk Score

Malware Insights

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

The PDF file contains a lure text suggesting it is a resignation letter due to health reasons. It embeds multiple external links, with one identified as a malicious redirector. This redirector likely leads to further malicious content or exploits. The file's structure and embedded links indicate a social engineering attempt to drive traffic to malicious infrastructure.

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.cc/wix?keyword=sample+resignation+letter+due+to+health+reasons
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/gabapokenugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/semegovidores.pdf
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/81219738285.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/canon_powershot_s3_is.pdf
    • https://cdn.shopify.com/s/files/1/0462/4442/9984/files/41187118982.pdf
    • https://static.usrfiles.com/ugd/b8c837_1035d7638ebd4db7a7bd4b6e53a0d5f9.pdf
    • https://static.usrfiles.com/ugd/33a2e4_eaca26b703ad40ed8daaf879390ffdce.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fab0fb2f8284ee8a177317f2dddbf43.pdf
    • https://static.usrfiles.com/ugd/286fb8_a108dc7c84b140579ebd163ffff2379e.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/nojid.pdf
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/solving_equations_and_inequalities_4._1_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a031d5f108b4b9387e444886ff409b7.pdf
    • https://static.usrfiles.com/ugd/e33828_50d9112313d4473097cfcc07fb88dc7b.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_3262efc2177d4758b1fc120a4a0e2bdb.pdf
    • https://static.usrfiles.com/ugd/33a2e4_d5463eb518c7443895dd9de7c19cea15.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_off00007837.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 2828 bytes
font_01_sfnt_off00008232.bin
557e89fdf09b62af5488e62f49b1edbcd6ac38892a19456da321ae9ac7034e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8232 5476 bytes
font_02_sfnt_off00009496.bin
104e38e001a9f249e58699f2890b149a8b0c9178e72a57f8b0d9ae148ef437c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9496 9776 bytes

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