Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b54a062b5e07ce9…

MALICIOUS

PDF

34.3 KB Created: 2020-08-29 18:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a0f544bb968c129b73a9e3ddcef4cc7 SHA-1: 23b3ee909c5525e7a63620a149b39de6a9adc8c1 SHA-256: 2b54a062b5e07ce9d4749487906f3b134bb50a2651aaaef063588ee7a35eab8f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. Another heuristic flags a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The primary purpose appears to be directing users to external, potentially malicious, content.

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=mala+luna+pdf
    • https://static.usrfiles.com/ugd/b8c837_e3a8db40e6624ff2b65cd536ca64170b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9ddf0733eb54bbc9b41d317c0533e6f.pdf
    • https://static.usrfiles.com/ugd/de65f7_cdb415447bb54e0782141277440d9e7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4b27a19a9c04f3e986963b242c21e9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1017a7d1e614278aeca2023679385cf.pdf
    • https://static.usrfiles.com/ugd/9219f8_ff39a32f18ed42fd9ec94293f52e68e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5376b674dddb4ee6839607f6e6dd5dc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_afc8f188e4a548d1bacb7fcad7aeffd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d175c591d8d45b98a37a652e5fb167c.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/99213877774.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/kadepebusefakemomev.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/99223193406.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/69263744014.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3b7e6ba1dcd4a3a8e9da07b81913988.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e9a9968972a4ab38b058861676c5577.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_off00004b05.bin
0a97683df250266c5a72f47cfa98f8599ecbb29ca72b4f5f5e3b975e06846560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B05 4764 bytes
font_01_sfnt_off00005b58.bin
b456ad185a1ce4e9b6bbf25f4511891b7a042e6f6e6e70777c541b06190d3b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B58 9836 bytes

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