Malicious PDF — malware analysis report

Static analysis result for SHA-256 db33f38646ef49a9…

MALICIOUS

PDF

65.4 KB Created: 2020-09-03 01:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6874846fca844bc3633e6185b52f6efe SHA-1: 83bcca937adcd2536c614139bf0170d7b9a90be3 SHA-256: db33f38646ef49a97fc8d79e16200a68b202f8433319bf0a33050c52a8268884
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to direct users to a malicious redirector at 'https://ttraff.ru/wix?keyword=yes+or+yes+piano+sheet'. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, suggesting a social engineering attempt to drive traffic to malicious infrastructure. The presence of numerous external PDF links indicates a link farm strategy, likely for SEO manipulation or malware distribution.

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=yes+or+yes+piano+sheet
    • https://cdn.shopify.com/s/files/1/0430/4312/7447/files/18199132568.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/57661602891.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/29258333105.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/71507729793.pdf
    • https://static.usrfiles.com/ugd/824332_bfa85a9595004e18ad0ea61adfdf4ee2.pdf
    • https://static.usrfiles.com/ugd/a891c0_18d7814cbb4f4da696843e64a029ec17.pdf
    • https://static.usrfiles.com/ugd/bae363_534bc64fad464393b6eba2afb8506a00.pdf
    • https://static.usrfiles.com/ugd/efc97f_20f8fbf02df641009e5df1913ce27b83.pdf
    • https://static.usrfiles.com/ugd/f3cb45_f89e6d6015664428a3a04b86f624e516.pdf
    • https://static.usrfiles.com/ugd/07e02c_7e6e455f4ee04712b37f96a25dd1127d.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_41799974dd994adaaabab268348d6767.pdf
    • https://static.usrfiles.com/ugd/07e02c_06ad6590b14d451baa8d5810c3adabe1.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e0823010ef84d159ac91ae40d069f73.pdf
    • https://static.usrfiles.com/ugd/8c0e65_a77fd81c1d714905b7a40df5403f37e1.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_off0000549b.bin
851fcf70dcdc2e5af290072c75d8acbe29e5d148c72dae913a372ad13c7089de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x549B 16644 bytes
font_01_sfnt_off000086ea.bin
d44ae7da835f2c8632cdaf6239fd9c1aa24980e204f9ee06f7753b9537649c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86EA 4940 bytes
font_02_sfnt_off000097ad.bin
3b115dcdad845111e937475b011c3dc9459191c2ea70b51396e6f98eb8cae633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AD 9912 bytes
font_03_sfnt_off0000b3e5.bin
8104851ce00133ad98e9d5c5656cb1b8579de91c695dec810e6f7da493651425		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E5 14612 bytes
font_04_sfnt_off0000e120.bin
99dc80f4e35ecbd485aec20692fae4feb9ee2895e9102f631d55a3222af1d7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 16080 bytes

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