Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3d9612c03093ee…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 13:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ab3d5ffa2d6d6a71532967200f2f1a SHA-1: f984d37133f3e22400694c57c219a4440c957a39 SHA-256: 4d3d9612c03093eec053e20e8b19b4db5a04237d4b97dfbdd850a3d6009e6efb
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=pokemon+leaf+green+guide'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous URLs hosted on 'static.usrfiles.com'. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to lure users 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.ru/wix?keyword=pokemon+leaf+green+guide
    • https://static.usrfiles.com/ugd/d4da64_43397aacc7b147ada62ee16b522e44bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_204a331194f440838d8c927d2a2c01f9.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_63f09738a5a94d70930331c1f7a0f90e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d68fe38d6d5c49fe9c11b01871f5692c.pdf
    • https://static.usrfiles.com/ugd/4ae4db_9a751a7425154c69b8ffcaba32e61251.pdf
    • https://static.usrfiles.com/ugd/02beb7_62fe7fed0b9542fea8623e50a95fcd90.pdf
    • https://static.usrfiles.com/ugd/63022f_85f0183d3a1d456a84e9c92d02fa6b5b.pdf
    • https://static.usrfiles.com/ugd/2c8d66_8f1cbd3f8ea044a392e6f2fff9c0f4af.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d963c41c3254c718a19e9826dba365e.pdf
    • https://static.usrfiles.com/ugd/5ed537_d78860a2fcd4497cbdaee47906c840a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2f3e755c7684819adf616f6772488ab.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_off000060b3.bin
0a93a1a04170ab64dd9eeebfcefd55aded7698ed5b7803012850092c367a4ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 5116 bytes
font_01_sfnt_off00007203.bin
bb42d61bf0d02ca261aab3db42a403ce747179d0f398204f2606d87bcfe8d77b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7203 10476 bytes

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