Malicious PDF — malware analysis report

Static analysis result for SHA-256 2460c69a145029ee…

MALICIOUS

PDF

40.3 KB Created: 2020-09-12 00:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7ba4f3c1f665d04fddefa557cc8de33 SHA-1: 4f39f039da249f385e6739fd2b22fd8047f67574 SHA-256: 2460c69a145029eeb927e2e140076426fb40c315431666f4cfd5c82a1c16abf2
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute malicious content or engage in SEO poisoning. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements points to a likely attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=formaggi+per+polenta+taragna+bergamasca
    • http://pufufaze.drewsyvertsen.com/uploads/1/3/2/7/132712326/8228d5ad633af.pdf
    • http://sirebibo.evildragonfiretheater.com/uploads/1/3/2/3/132303134/lonemamaj.pdf
    • https://static.usrfiles.com/ugd/b81754_442fba845679483a8b05928e15a0bdb9.pdf
    • https://static.usrfiles.com/ugd/40336e_7ff237d0c32c426a8e8713613872f477.pdf
    • https://static.usrfiles.com/ugd/dbbfd0_9feef5a200834aca9e0fc1c4082f4a5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_42eccfa6e4cd4a4082202e7c8a726db6.pdf
    • https://static.usrfiles.com/ugd/9f69bd_9c8098bb42a24a9baf7a6c2c190e1174.pdf
    • https://static.usrfiles.com/ugd/314c35_0d6475d9fda2498099e45c74d01effa1.pdf
    • https://static.usrfiles.com/ugd/143c98_8cef760bdafe49a9a11f1f5fe8a51b11.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a32f9a173434f7e8917de39d3e0c75a.pdf
    • https://static.usrfiles.com/ugd/52b593_37b0201a58404f92be91e6fe32ba1e7d.pdf
    • https://static.usrfiles.com/ugd/3bbd68_d2be4e2ff6fc48d381864074a39d0634.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_off00005f19.bin
72ed2b2494b59f49bd9968967a1fde8d3943d85d6b054e252c3635543f1c8db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F19 5348 bytes
font_01_sfnt_off00007130.bin
076da5767860d0374a200deb64f3638bfaf77b362091dabf28c0d94474851e21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 10368 bytes

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