Malicious PDF — malware analysis report

Static analysis result for SHA-256 36242ab605803956…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 08:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72c6bf8db9461a42df8cd181ee1eb59a SHA-1: c4b8e5ffb1b4ee95610ab4c44545c42f8af10996 SHA-256: 36242ab605803956d4383aa16b553fde94f11a5341df58a948fd38c5aeb5e5e7
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains the URL https://ttraff.ru/wix?keyword=how+to+calculate+theoretical+yield+of+alum, which is flagged as a malicious redirector. This suggests the document is designed to trick users into visiting this malicious link, likely leading to further compromise.

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=how+to+calculate+theoretical+yield+of+alum
    • https://static.usrfiles.com/ugd/b8c837_f20e34dc86bb4b579029d044e266d776.pdf
    • https://static.usrfiles.com/ugd/0adedf_0a4db7f6964441a2b3f61119aa98eba5.pdf
    • https://static.usrfiles.com/ugd/3b47cb_cad43cf67e3e4cbd98c9afa65bc03b4a.pdf
    • https://cdn.shopify.com/s/files/1/0452/8763/7154/files/vocabulary_for_ielts_speaking_and_writing.pdf
    • https://static.usrfiles.com/ugd/7d21c0_0d1c6f6cd1314b7096a5cab099423cd8.pdf
    • https://static.usrfiles.com/ugd/79cb75_ad1d7ce9361c412baf7af46d1647fbc5.pdf
    • https://static.usrfiles.com/ugd/314c35_c4f639b9f76e48c6b0d6a096bd6c6fcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a6bda7af1f449e880e4ca11bba2ed33.pdf
    • https://static.usrfiles.com/ugd/912de2_7e01221ee5f54b8e9c18a10f5cdbdd9a.pdf
    • https://static.usrfiles.com/ugd/0df15e_3a5611aaf2e04a4193c15f563d2099c7.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_off00005df3.bin
8da4368d1a47b38e7a49e24d43189f89b29eea3e31a1717709b0c07c9f1b4a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 5240 bytes
font_01_sfnt_off00006fb0.bin
b53fee5933685f49110cb0b391b5b69e0084e3449c51d3c397499bb112f709e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB0 10352 bytes

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