Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e8122045be6c04…

MALICIOUS

PDF

52.0 KB Created: 2020-08-31 05:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 077570140d3635b78d3431def0732ddb SHA-1: c7526708222f6869f0063e904080bb5280531be4 SHA-256: f1e8122045be6c0492a6f18f4d1ecb12f6ce299d2cead5bb36a0aa43c8f678f9
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The embedded URL points to 'ttraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The large number of outbound links to 'static.usrfiles.com' indicates a link farm strategy, likely to obscure the final malicious destination or for SEO manipulation.

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=desh+rangila+fanaa+mp3+download
    • https://static.usrfiles.com/ugd/01e791_c53d0f0d1fc64790bee7410e53237682.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_a49f2e13de41481e90d553f606cfa48f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcd678c7ef524c07bc309c103da931d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_21cc0cae5a5d426ca3d9d6962460034b.pdf
    • https://static.usrfiles.com/ugd/b8c837_57218dcf9dc4439c993db971d6dc7c39.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1c7bc2589ff442eaeb0f013c4b53601.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f519e095f76478abb2581925e1b4bc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_889bbe83afd54d46bbfef5d9a3a0254c.pdf
    • https://static.usrfiles.com/ugd/516574_5da82191198d407bad932cefb84a6d74.pdf
    • https://static.usrfiles.com/ugd/b8c837_88b9ef4220b64299b85ebb8981df6e3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6496ba0ea7e0410296fce502a7dc1e01.pdf
    • https://static.usrfiles.com/ugd/b8c837_0536c9bc57ad472bbb5a5fa32ff314f3.pdf
    • https://static.usrfiles.com/ugd/5b9a87_602125f6e254408c9a638c0df630b1e4.pdf
    • https://static.usrfiles.com/ugd/64d889_e794c7aa5d1040caa7610d4b28d7f6c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc2ca64bcc87477fb5d65930b045d250.pdf
    • https://static.usrfiles.com/ugd/6116da_a39dcee9a0d34356b1e6dc4c365ffa8d.pdf
    • https://static.usrfiles.com/ugd/353d00_4b27e81ed2b44b50bb7b5627d921bbff.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007676.bin
4afd04e52fd81f331062e1dca66914918e5acf0d98f499922b7b02f74d6cacd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 5712 bytes
font_01_sfnt_off000089cd.bin
46ebb2d017bac6db3bb3c36a45a10398d229263414340a16984270f32ccd2ac3
pdf-font-stream PDF embedded font (sfnt) at offset 0x89CD 10344 bytes
font_02_sfnt_off0000ad57.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD57 16164 bytes