Malicious PDF — malware analysis report

Static analysis result for SHA-256 e732f2e62955cf49…

MALICIOUS

PDF

33.7 KB Created: 2020-08-29 21:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8683799059eb722c5c8556ffab6f5967 SHA-1: c416e2864a1feb55af5304bfcf496bff919dd539 SHA-256: e732f2e62955cf491ac3fcf9417cf164b70c6e57dbb2d64f8175be089d5f69cd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.ru/wix?keyword=problemas+de+canales+hidraulicos+res, points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a link farm indicates an attempt to broaden the reach of the malicious redirection.

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=problemas+de+canales+hidraulicos+res
    • https://static.usrfiles.com/ugd/bfbc46_e726102acf554ec398b81264bc79c4c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb28072733b24862b11105ec8d3431bb.pdf
    • https://static.usrfiles.com/ugd/3aca14_4b78d94a74264959aa068c6bebde4bb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_99ba59804ab64eb4abdcbe0392892358.pdf
    • https://static.usrfiles.com/ugd/5bb01c_80f431df26564ab993075663e1bdafe0.pdf
    • https://static.usrfiles.com/ugd/b8c837_94654a8b021846d6a31af0396024b847.pdf
    • https://static.usrfiles.com/ugd/a4e402_2cbd73e9e8424c57a2a54be0530cf636.pdf
    • https://static.usrfiles.com/ugd/516793_d8b0d2943605436aa4a56c0ea520ea03.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3231aef4ee41f991438e683adcb6bc.pdf
    • https://static.usrfiles.com/ugd/455f95_26755528f8a74d1eb1baa2629987f6de.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c1175f3ae2c4fb7bcb9c123a97a28ad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/81243334253.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/81269505481.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_off000045e3.bin
bc7f4fc432406fa7ebb07562bf29670ac9d3ef5b03380b7ca6b77bcad4aabfaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45E3 5320 bytes
font_01_sfnt_off000057b9.bin
308aef59cfa95360e466a0dd0b8b0af127347b8c6a7bfdd73d3fa6d505e5e036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B9 10212 bytes

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