Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7e6e505e0c5602…

MALICIOUS

PDF

36.1 KB Created: 2020-08-31 09:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74ee25987e12d187a804cb1af37a14cd SHA-1: 5026849089eb48070441e10a6849858957a4c279 SHA-256: 8a7e6e505e0c56028c191a05d57fac3e98f040f2135fad87a992f137983b2a52
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The primary malicious URL, https://ttraff.ru/wix?keyword=loi+bai+gap+go+duc+kito, is likely used to funnel victims to a phishing or malware distribution site. The presence of a link farm suggests an attempt to obscure the final destination and potentially improve search engine ranking for malicious content.

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.ru/wix?keyword=loi+bai+gap+go+duc+kito
    • https://static.usrfiles.com/ugd/b42fd6_9eed43253230490b9bf4e5e6b99f5a39.pdf
    • https://static.usrfiles.com/ugd/e3ff21_39e6685b67824db7847a715c49fee29d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5d220dd90284c729c86f96fde353a67.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/cask_of_amontillado_edgar_allan_poe.pdf
    • https://cdn.shopify.com/s/files/1/0466/7457/5525/files/86914780038.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/nediju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lokilus.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/bewonatibozavobovaseguduf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/mukimubadatujujatakufi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/billetes_didacticos_colombianos_para_imprimir.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_off000050fa.bin
67339d2aeaa1d96b03a301ad70fad1c57d77667bb6ea9dafbc7e19cbedb96988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50FA 5080 bytes
font_01_sfnt_off00006248.bin
a9d38f83499d4147f101259102ba390f3554940a5961bc63442572923677a744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6248 9816 bytes

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