Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6211eff475ea3ac…

MALICIOUS

PDF

40.5 KB Created: 2020-09-07 07:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04016ce13fa81e34506c600c7f5aed4c SHA-1: da6c40d88cb7c42fb823fc3adf4e29f056d19e87 SHA-256: d6211eff475ea3acb87dcb78ca5fe0334bd5f3e049bcf613222dbe4e74b415d5
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free book design software download, aiming to lure users to a malicious site. The PDF also hosts a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation or traffic redirection. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=book+designing+software+free
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nidosavexurirevinuno.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/surupanezefafi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7122/6535/files/79362593351.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/all_in_one_science_class_10_term_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/91790504453.pdf
    • https://static.usrfiles.com/ugd/b916f4_898f0f50d2934ccead7dcb5568107fa3.pdf
    • https://static.usrfiles.com/ugd/dba42a_6c3eb70306c640f3846233ff4b2f3b31.pdf
    • https://static.usrfiles.com/ugd/0d089b_169315b2572e43c98717502d832f2de8.pdf
    • https://static.usrfiles.com/ugd/6e13d9_c7624dcdfa1b4c10bdd7f8b73ce19180.pdf
    • https://static.usrfiles.com/ugd/8c2e83_4d8389aa4c914c1ebf3373d4d1102d2f.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_0f7436d974384c7188b37dc0e91c5d8f.pdf
    • https://static.usrfiles.com/ugd/78c764_b3e3ececd27344b0b5e70db363ccc52c.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_5a6cf330a1544deb92955637abae8176.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_off000060d3.bin
be04ca2672f9b670fb9891fae172c480c398c7d3a81f53f1210820a757d20354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 5248 bytes
font_01_sfnt_off000072de.bin
9d320bcf63091fa824d94da362436da5a9a792ab8982b6ba82b1ab3c2071763f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DE 10140 bytes

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