Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf6e615a4598e93…

MALICIOUS

PDF

60.5 KB Created: 2020-09-01 01:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fe846091f23f9be28ee6d39743d2c84 SHA-1: a08d69d6e88a45518259325d4cc58a8d29026bdf SHA-256: 8cf6e615a4598e9302a805c811180c4af6f5038c772064b04f928e0609f050dc
150 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 a URL associated with movie piracy keywords. This URL is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which are benign Shopify URLs, likely used to mask the malicious redirector.

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=tamilrockers+2019+full+movie++petta
    • https://cdn.shopify.com/s/files/1/0435/8825/5912/files/authorship_of_the_gospels.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/kingdoms_of_amalur_reckoning_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/fefemirixiwowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/3122829072.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/43304258607.pdf
    • https://static.usrfiles.com/ugd/b8c837_1055622cf7514a72b97882590e5e2772.pdf
    • https://static.usrfiles.com/ugd/a467d2_35c9cb2fba5c445484d19bff6143adf5.pdf
    • https://static.usrfiles.com/ugd/f09a9d_2f7767def7ba47f79a9dea82586a98ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb4484087e64ace9d7fdfd0b98e83e3.pdf
    • https://static.usrfiles.com/ugd/a18aa6_127557f5acf2434fb269ee991d7d9b9a.pdf
    • https://static.usrfiles.com/ugd/0d002d_a9adac1cc76143efbb935cbba8e08687.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f5de14617d5407e8f4c54e057b94155.pdf
    • https://static.usrfiles.com/ugd/73c254_6e197f48098444c7b62ce0b97ef05781.pdf
    • https://static.usrfiles.com/ugd/9904c2_f045ae8ef58c4dccb4924fb2b6c7b565.pdf
    • https://static.usrfiles.com/ugd/b8c837_3905be4b457444fa9f0e98a4d2f747d2.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a5a.bin
0aaa79ab11f1aef5cf812c94c3c8c1c5a163c8649319b07e8139feab9d396c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5A 5716 bytes
font_01_sfnt_off00007dbf.bin
1715760f864f689e922d2a683c5608a01dc771e363c8ce4cb23b96640501e8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 4940 bytes
font_02_sfnt_off00008eab.bin
c50c1976ad4b09d7bc0d4be1c82110e88579d6981baf224c7b283e1f47e970a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAB 6156 bytes
font_03_sfnt_off0000a471.bin
5088193adc0ef0d0a7b4344d2dca39827840251a6349696291e684bb724c3327		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA471 11196 bytes
font_04_sfnt_off0000caa7.bin
1db25f09ef0cf81dd984ac5c0f900fa7487c60115d628b11e04ff20b50ac7b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA7 17860 bytes

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