Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e109e828e2ef0e…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 08:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eaaa100f1565be9656fe488336eec4b SHA-1: f12a429e05839d0ac632980503bcc52abd387d6a SHA-256: 52e109e828e2ef0ef2edce84789662ada605a69dc5350faa100f0e4f7e7ef0a3
120 Risk Score

Malware Insights

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

The PDF file contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'tools and techniques used for training need analysis'. The presence of numerous external PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy. The primary malicious URL is https://ttraff.com/wix?keyword=various+tools+and+techniques+used+for+training+need+analysis.

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.com/wix?keyword=various+tools+and+techniques+used+for+training+need+analysis
    • https://static.usrfiles.com/ugd/b8c837_84db9e038b76482c880203a6b52351f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_778fabad083c45bcac7329df819bf7d4.pdf
    • https://static.usrfiles.com/ugd/36f25b_b4ff133d3ee646acbacb074508421bcb.pdf
    • https://static.usrfiles.com/ugd/ac72e0_0886f23abccc4e0dbe19e0d0eb950502.pdf
    • https://static.usrfiles.com/ugd/7c3584_f2334c42d1494ecb949f2ed31ef1083b.pdf
    • https://static.usrfiles.com/ugd/b77b08_e37b4255623c4c81908e04e8ea9e792c.pdf
    • https://static.usrfiles.com/ugd/c7a620_33f43baa81864b63a9b8efaa468fbd52.pdf
    • https://static.usrfiles.com/ugd/0adedf_7167d795cbc847cabd4146a949544079.pdf
    • https://static.usrfiles.com/ugd/253000_7008dcf1f90e4c96af7f3f8b922c031b.pdf
    • https://static.usrfiles.com/ugd/b28561_96746d767e7c4c6aacaab1c229078ed3.pdf
    • https://static.usrfiles.com/ugd/49be48_ae25c081961245e5a5b2fe86c952a181.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7958/files/barney_stinson_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5432/files/cisco_switch_3850_datasheet.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_off00006daf.bin
3485aab6f73d796292d660c653a460202a8928a5ea7739b404d2b615ae8a947d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 5476 bytes
font_01_sfnt_off00008046.bin
dcc10840c8d03f0ab6f933dce920c14a09d28653e2fb43d2a7057b5730f4c341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8046 10172 bytes

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