Malicious PDF — malware analysis report

Static analysis result for SHA-256 485f7c1f15fd3db2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 03:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f37a08c8f187bd3afe554c535ae6e2b SHA-1: ba19a081f2516899bdcf04c9425850bea0e438ab SHA-256: 485f7c1f15fd3db2609ddec788774928ff3ba7dbeea4564a2e0554766b6bdaf9
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/wix?keyword=third+eye+chakra+meditation+music+free+download`. This URL is embedded within the document body, which also contains garbled text and other PDF links. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=third+eye+chakra+meditation+music+free+download
    • https://static.usrfiles.com/ugd/1cc777_e6c1b2294c1a4d559e91ce7ec716ca06.pdf
    • https://static.usrfiles.com/ugd/f14cf6_9ed2967130bb407d99565cf00a779b84.pdf
    • https://static.usrfiles.com/ugd/b8c837_55e7767d0cdd483a97363b0b4daa3e13.pdf
    • https://static.usrfiles.com/ugd/a18aa6_747dcb7e079446c9899d7f2fc444efe5.pdf
    • https://static.usrfiles.com/ugd/7dd30d_164b6ce672dd4f4fa9f7244e4050eab6.pdf
    • https://static.usrfiles.com/ugd/b8c837_0520b94c0f5e4d7682e4512e462c7469.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b921cfaf69c4d6ab3c0c9fec767e3f7.pdf
    • https://static.usrfiles.com/ugd/97368a_8a554aaaf7d447bdbe2fccea581120dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_08ce67292ba04e478bef283720af5827.pdf
    • https://static.usrfiles.com/ugd/804ff6_9dd19388e861428cb00c50a4514ee276.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/tutidodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/70256142658.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/vegovutikadunafukisi.pdf
    • https://static.usrfiles.com/ugd/6908d7_e98b9980a58742a6a7816cce2f7365d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f101c65fa2fe4cafa78c193f6aab79a0.pdf
    • https://static.usrfiles.com/ugd/3eed2b_ddb2ba90105243ffb6a60c87e3c353ae.pdf
    • https://static.usrfiles.com/ugd/906e9f_620c652b52f247c297cac24410044b85.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056d6.bin
92c0f7b03fe8791f0f784a7845fb77198a0cf25ae3c54fe949a8ec9f4d930290		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D6 5348 bytes
font_01_sfnt_off000068e9.bin
ef45a68ee49e3bb141eb706d167bdba765d65abed481e9436245bebae9b3cf31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E9 9816 bytes
font_02_sfnt_off00008a7d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7D 4324 bytes

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