Malicious PDF — malware analysis report

Static analysis result for SHA-256 29676a4f17074058…

MALICIOUS

PDF

48.0 KB Created: 2020-08-30 11:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c74fab7e85a4a1fc5a1a4f1d28aa263 SHA-1: 697420dbf9767db7a0355f54dcd8b0b9632a2ea1 SHA-256: 29676a4f17074058237e029091ca60339b9ac8e41be38bfa0379fed922522f91
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a link farm containing numerous external links. One of these links, 'https://ttraff.ru/wix?keyword=tew-637ap+repeater+mode', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL, suggesting it is the primary lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector.

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=tew-637ap+repeater+mode
    • https://static.usrfiles.com/ugd/b8c837_14bc6957236c4121b92d4b9c3224770d.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcc17a7272924eab8106535be1aeb6b5.pdf
    • https://static.usrfiles.com/ugd/08fe48_27e09ac2181d45c9b3c940ecb0c8cf97.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_5e746ab3e7274e8ebd60554f0aec35a8.pdf
    • https://static.usrfiles.com/ugd/e5a943_b2bc6f1b5c8c4fbb9df62a557d27e8bd.pdf
    • https://static.usrfiles.com/ugd/724fb5_7ffb26dfc6d1445fb62c682f2cd3af61.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a3ef07e97904202a80aa852f99cc785.pdf
    • https://static.usrfiles.com/ugd/b8c837_7201f6fead11433995dd04fb9a5e2270.pdf
    • https://static.usrfiles.com/ugd/b8c837_31abda09386c4690a9519d8b20c6ffb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://static.usrfiles.com/ugd/7ff653_68d3f18d342e4e7fb55dfcc1805cdae6.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/
    • https://static.usrfiles.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d98.bin
5ee3bc6c3f19fb26d6712b0ca5aa6705e5770c2c6cb1d121acc24bd9b1dd556d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D98 5368 bytes
font_01_sfnt_off00008fe0.bin
2a4572d2621579866d7a4e2917c3415e69a5bc4eeaebb1fbcd5586550a1fda49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE0 10436 bytes

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