Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b866d1e7364cfb…

MALICIOUS

PDF

43.3 KB Created: 2020-09-05 09:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64074b81b8cf444845a36d15d89045aa SHA-1: cfc4eada91de50e2f1cd03522e860951f37c3664 SHA-256: 48b866d1e7364cfb01f8b36d1d260c10f1022159d01ca8b88245bf6d0a0ceff2
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to PDF files hosted on Shopify and static.usrfiles.com, which is indicative of a link farm. One of these links, 'https://ttraff.link/wix?keyword=gathering+blue+study+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting the primary goal is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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.link/wix?keyword=gathering+blue+study+guide
    • https://cdn.shopify.com/s/files/1/0462/3443/5733/files/animus_stand_alone_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/lawila.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/cannibal_holocaust_movie_in_tamil_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/kutilanuzat.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/pivexetidenabif.pdf
    • https://static.usrfiles.com/ugd/43d598_762156f986ec4d4995b5390cd2b5c6ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeff4ba2c74d4a128f8b9975cb84a643.pdf
    • https://static.usrfiles.com/ugd/fb83f1_c9e0daa246b347d9a6fe4ab650700127.pdf
    • https://static.usrfiles.com/ugd/8b97dd_53505a47c22d4abb81e52f7165c78c98.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4ad0c5470d84547a3b459b64627caf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e193b490a195484cbd5dcd59b475fd65.pdf
    • https://static.usrfiles.com/ugd/f09a9d_aab761e89fee4bee8a9e39e10899a2ff.pdf
    • https://static.usrfiles.com/ugd/345929_81ce3fd552ab4d6ca4b8cd66a42f0847.pdf
    • https://static.usrfiles.com/ugd/97493d_63c711581b0c4776929701b9a7592bc9.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_off00006bc4.bin
19d8502498fd98e57018530c2680fecf86b6cf5759c5bb87038ad194e4b121b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC4 5360 bytes
font_01_sfnt_off00007dfd.bin
ef77f89f56955354ecd78aa4c6b5ac95806d0e48bb52cc6f77a5f16a9a4ff86e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFD 10060 bytes

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