Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6c61bcff4c83a2…

MALICIOUS

PDF

36.0 KB Created: 2020-08-31 13:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bbc6f316d8df9fbf1e2bbc954d29aa5 SHA-1: 9bd956fbb668b4c6f748ff39476aaf986b5606ce SHA-256: 3f6c61bcff4c83a242ca1aceae7a254e516faf713e98496d64b575021311e8dc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/wix?keyword=electron+configuration+for+au2', is identified as a known malicious redirector. This suggests a tactic of using a link farm to obscure the malicious destination and potentially for SEO poisoning. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact lure.

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=electron+configuration+for+au2
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/xikugikokexurew.pdf
    • https://cdn.shopify.com/s/files/1/0432/2410/5121/files/finaruzenaxufeloxavulotu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/florida_profit_corporation_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5070/files/enquiry_form_template_bootstrap.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/sankarabharanam_naa_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://static.usrfiles.com/ugd/b9801a_c1bd4fa02e71471b9cb1d78a2e29d264.pdf
    • https://static.usrfiles.com/ugd/dc51bb_496d5f35b1bd40e3901ca128bd166f45.pdf
    • https://static.usrfiles.com/ugd/9219f8_e9554a2449204d2089d89791cdb1da68.pdf
    • https://static.usrfiles.com/ugd/b8c837_607e5fb06bcc44f8b07ec7d86fae0efb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6284ee5ef7f74cc293fa6d99cbb42d45.pdf
    • https://static.usrfiles.com/ugd/c618e9_f87db8e69a32448e92e2ed5542c2a08e.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_off00004fe5.bin
71f2ebbccba4f16f4bf60d48e44f87d70c70c75ad38d4258fe90f9850b5e8ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE5 4960 bytes
font_01_sfnt_off000060d9.bin
ab62ad3ed2c24efe807e38c9ef99e92433928a254f1117f28119f37b7d02df7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 10172 bytes

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