Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd40e366f9ae4eab…

MALICIOUS

PDF

34.3 KB Created: 2020-08-31 10:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c28afc28e798e5263df6b50dad9defc4 SHA-1: 2abcfc5ed4fece722ccdf46c7a51a3349a28647b SHA-256: fd40e366f9ae4eab57e2496238152a74680cf5190a539a7e9538333399875832
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign content, but one critical link redirects to known malicious infrastructure. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=devry+university+academic+catalog', which is flagged as a malicious redirector. This suggests the document is designed to lure users into clicking a deceptive link, likely leading to a phishing or malware download site.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=devry+university+academic+catalog
    • https://cdn.shopify.com/s/files/1/0438/7382/9032/files/lesser_key_of_solomon.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/input_file_accept_and_excel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5676/files/whoqol_breve_italiano.pdf
    • https://static.usrfiles.com/ugd/b5aed9_243010dfc5814a9e94154cd6adebdb2b.pdf
    • https://static.usrfiles.com/ugd/0cd019_454a39dfc9624187a52dfa878b67ec6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a025a233fc5477abb992ae1d0e5310b.pdf
    • https://static.usrfiles.com/ugd/b8c837_45da52d625c44efcb53d7e24afddb6c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7a6cfca65204dce83d680068a15a65a.pdf
    • https://static.usrfiles.com/ugd/b8c837_12cdad824b15451aa7f3ac4998643da9.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9a69bcc4ee8492594ddbdeac6519153.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecf87b87e9d6415997fea48b7193cf8d.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_off000047ab.bin
c02d7fa86fe3d855ce14e2d7e6e715b5f7bcf20c58edf19f193c0155938f9426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47AB 5420 bytes
font_01_sfnt_off00005a10.bin
fe459945e4b21494c0f0b276931db1ba8852e561011b48285cdd5216f62fe40d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A10 10056 bytes

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