Malicious PDF — malware analysis report

Static analysis result for SHA-256 383da7093ca763d0…

MALICIOUS

PDF

36.0 KB Created: 2020-08-29 15:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 835f500ba9c8887b56762ed703f132c9 SHA-1: 226b5d90b0a926b67b29861837d831e8522763a6 SHA-256: 383da7093ca763d081c8decf862af11b647d9d9cbb30fb15c31598019ff3c5ca
120 Risk Score

Malware Insights

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

The PDF contains a link to a redirector disguised as a driver download for a Toshiba satellite c655. The PDF also exhibits characteristics of an SEO link farm, with numerous embedded links to various PDF files hosted on Shopify. The primary malicious link is https://ttraff.me/wix?keyword=toshiba+satellite+c655+drivers+windo, which is flagged as a malicious redirector.

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.me/wix?keyword=toshiba+satellite+c655+drivers+windo
    • https://static.usrfiles.com/ugd/b8c837_a97b7b482b1f4b9d9018c8a9f4f5b253.pdf
    • https://static.usrfiles.com/ugd/b8c837_50de56314d6148a9a7aeff2e45a672c9.pdf
    • https://static.usrfiles.com/ugd/01e791_3f51281d26a241288e50c44e064ff8ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc64a79bd1e343d5a31e14258736a2f3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/55373402272.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/sanatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/south_africa_culture.pdf
    • https://cdn.shopify.com/s/files/1/0435/5683/1395/files/mizizebe.pdf
    • https://cdn.shopify.com/s/files/1/0457/9200/2204/files/bopejewezewol.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/rusozonajodesowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/92949216766.pdf
    • https://cdn.shopify.com/s/files/1/0464/8658/5512/files/sozuf.pdf
    • https://cdn.shopify.com/s/files/1/0464/5784/7976/files/quimica_general_whitten.pdf
    • https://cdn.shopify.com/s/files/1/0435/5856/8097/files/28011827036.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_off00004e6d.bin
9504697edbec9e208bbdab360f2cc57b7c1f20d46d05cda70fe8940427c0a839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6D 5548 bytes
font_01_sfnt_off00006152.bin
725dc400c71a2aad1fa3ceabe182be4a3d45d59cf7f6895f3e91af356d6246c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 9972 bytes

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