Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54c3692fe28c129…

MALICIOUS

PDF

44.7 KB Created: 2020-08-31 12:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cd41d49acd361fc65ed1d2ec0cdd817 SHA-1: c02b0db607034ae91144aae71c61a97d787de1eb SHA-256: b54c3692fe28c129c375673960e36c2d29abebf47144c3fc5624a210fbd8ed1f
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.com/wix?keyword=la+dinamica+de+los+grupos+peque%25C3%25B1os+p', points to known malicious redirector infrastructure. The document body itself is heavily obfuscated and appears to be generated content, further supporting the malicious intent of redirecting users to harmful sites.

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=la+dinamica+de+los+grupos+peque%25C3%25B1os+p
    • https://static.usrfiles.com/ugd/be19e1_9a5ccff8164c4a59a3b2ff827887304c.pdf
    • https://static.usrfiles.com/ugd/696b8a_03b727a99b78477180158da60b298c34.pdf
    • https://static.usrfiles.com/ugd/a771bd_f2c908f70ee6467082d9906c42c95b4a.pdf
    • https://static.usrfiles.com/ugd/451a43_11a601198fbf4e668c1a9f9d7b386143.pdf
    • https://static.usrfiles.com/ugd/40512e_a2ed088ef2074f6282b2dbb8f926df5c.pdf
    • https://static.usrfiles.com/ugd/934fc3_704c32cb68d24511a1fc3b137dc01fbf.pdf
    • https://static.usrfiles.com/ugd/3b7182_c6dd0f963470421dbcc1f021ccd947b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_69b7f69f54454e3f9f877e93227c4a94.pdf
    • https://static.usrfiles.com/ugd/2074c9_347ba8c078e245b98714679b81ab0eb8.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_37a58a279012442aa2d9c452059334f2.pdf
    • https://cdn.shopify.com/s/files/1/0434/8402/0898/files/97237568480.pdf
    • https://cdn.shopify.com/s/files/1/0457/4448/8604/files/lojosudunakepowip.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/wawuvejewazodepoxep.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/xebumulatevu.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_off00006d30.bin
7db4ae99016ff92d48d083f262053c80af1ced64abf6c74b7dcac421cb02b6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D30 5672 bytes
font_01_sfnt_off00008014.bin
f13c065cc210f92edf25628bb32585a9f8b8841eb8bbfbfa7a3f8f2ecac93001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8014 11284 bytes

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