Malicious PDF — malware analysis report

Static analysis result for SHA-256 411bcbd0e48a515b…

MALICIOUS

PDF

40.4 KB Created: 2020-08-29 13:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c8bb5d2d16d44071f4244425497b0c2 SHA-1: 91e576989c2ce8effd4da53257368b3e78a8ebd4 SHA-256: 411bcbd0e48a515bc5fd02a624f4c73385a15bc4d8c22cb429a69c43f77dda8c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=los+nuevos+profesionales+del+siglo+xxi'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with a significant number pointing to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, suggesting a lure to a malicious site.

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=los+nuevos+profesionales+del+siglo+xxi
    • https://static.usrfiles.com/ugd/b8c837_8af242500e944e1386a1ccb6cee31993.pdf
    • https://static.usrfiles.com/ugd/b8c837_d25c7ab58a8243cf896a62abec0d0184.pdf
    • https://static.usrfiles.com/ugd/253000_49f59db4fbc14fada9a34cd5966162a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c48052946144b0ab0da24408f636f6e.pdf
    • https://cdn.shopify.com/s/files/1/0450/7372/7651/files/davanoromafokad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/report_of_cioms_working_group_ix.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3008/files/6125168875.pdf
    • https://cdn.shopify.com/s/files/1/0430/5856/1175/files/donurofekuwujijixafam.pdf
    • https://cdn.shopify.com/s/files/1/0463/0393/6669/files/crew_change_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2904/files/45764847473.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/definition_of_artificial_intelligence.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6512/files/wunemapafevolulatopelaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/4334661630.pdf
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/tacoma_service_manual.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_off00005a81.bin
76f28e2247bb6dc8a0509a0c5f31e0cb5f2a77fc32eb0dfab6e2976a8b11cc86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A81 5280 bytes
font_01_sfnt_off00006c8e.bin
283d86efa23ad5d290fb46dd82d7714bfefc425e5388712236b9fd3f94c9b1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 11852 bytes

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