Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f405e46e2029f0d…

MALICIOUS

PDF

49.0 KB Created: 2020-08-29 23:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2d947d9d894e91bf0bc725a156a625e SHA-1: 90820922a343f3426eac8d3382e2f01150d2d305 SHA-256: 3f405e46e2029f0d51d8c2467b1954a928dee2bd7412c57a2eb5383ab44dcf97
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text that appears to be related to sheet music, suggesting a lure. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious content. The PDF structure and link farm indicate a social engineering attack designed to drive traffic to malicious infrastructure.

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.cc/wix?keyword=yiruma+moonlight+sheet+music
    • https://static.usrfiles.com/ugd/5fd5c1_ae170abcf34b4db8920d07dbd52a8fec.pdf
    • https://static.usrfiles.com/ugd/b8c837_70fa9ad2f64145bc96ffa54f0b6d7146.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e0c77853acd42b8b06dd8b4745f19d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_33831c1fddeb48aea40e27317376388d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9970b5da675482bb4c053a541134968.pdf
    • https://static.usrfiles.com/ugd/b8c837_47963734982241e7990898ec7b0ce1f7.pdf
    • https://static.usrfiles.com/ugd/23e9be_3fbc291fea394d7a90032d97c0e6fb4b.pdf
    • https://static.usrfiles.com/ugd/73cb9e_81ad9b9f7490416997cfdcd28658712a.pdf
    • https://static.usrfiles.com/ugd/b13fd1_e873eb938a664eab8f38c8880e41aeee.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d88e6aefc154d86af4391af79b3df07.pdf
    • https://static.usrfiles.com/ugd/bf650e_728a67320254427ba29a4fb8a2b430ec.pdf
    • https://static.usrfiles.com/ugd/97634b_a66235d5f2b444c996ae859f8274836f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c57a39f659d94095ad8bea18dad3c719.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_off0000649d.bin
77e3c6254db505afc46b128defd5ee600d993204bf0990deca1054eb2f2f48e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 3452 bytes
font_01_sfnt_off0000710f.bin
8fa751f55759e3c6668f6f65b9685ecf65111a00301c25f54943d7af4dd6f1f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710F 5176 bytes
font_02_sfnt_off0000826e.bin
d16e8b2c07cd1df98f9e70e2d8508d038641d6c69219d5408a3ea262a15516e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x826E 16708 bytes

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