Malicious PDF — malware analysis report

Static analysis result for SHA-256 31163111c6787823…

MALICIOUS

PDF

59.6 KB Created: 2020-09-04 15:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f794f853ee4438db246ea0ff81077c1 SHA-1: fa3fd026a26c391391c7ec93fbc80056d96dd815 SHA-256: 31163111c678782317b342e09c9c191cb22533d001911afe514e941892b20576
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=amazarashi+living+dead'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, also contains the same malicious URL and several benign-looking PDF links. The primary intent appears to be luring the user to the malicious URL.

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=amazarashi+living+dead
    • https://static.usrfiles.com/ugd/3ceeb9_41a6852977bf4c5499c323d0cc745533.pdf
    • https://static.usrfiles.com/ugd/3e87bf_2f30b0898fd5473aad88d7dc64fc082c.pdf
    • https://static.usrfiles.com/ugd/97aff7_596dcd4d48ab4086bdc6df4c5fae5810.pdf
    • https://static.usrfiles.com/ugd/b8c837_358936d5b6e44a50b4e47cd05945ba52.pdf
    • https://static.usrfiles.com/ugd/c0a468_397217ed59c14a45983ff971645b4450.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/31762831807.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/2765290202.pdf
    • https://cdn.shopify.com/s/files/1/0440/7489/3462/files/melob.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/26891795629.pdf
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/southern_state_capitals.pdf
    • https://static.usrfiles.com/ugd/15ebe2_ab31bb8a16bb4e259e041e6de66a5da6.pdf
    • https://static.usrfiles.com/ugd/a86d68_000adb97d7e147138a4681733a358b76.pdf
    • https://static.usrfiles.com/ugd/7041e4_de5983df92f3475eb007580c9bae2ee5.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b2.bin
8e7b70169bed912aa571c7ad29f0d29fab681625025d0e8c8b0a56b6ec25dbfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B2 18948 bytes
font_01_sfnt_off00009689.bin
6add8bb8d37a6bcd42e6e6c787d2c619ce5dea27f961a02b64f3afb0e9c953db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9689 4936 bytes
font_02_sfnt_off0000a714.bin
98c5785c4785f25e2078db806afc7ff5b4ef17aee7b155a8e53c08f0e5578040		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA714 14580 bytes
font_03_sfnt_off0000d386.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD386 4324 bytes

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