Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ca9bd630586a5d…

MALICIOUS

PDF

53.8 KB Created: 2020-08-31 17:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb5a297910f6204ec8205e7267a77310 SHA-1: 940c8437f9586444cc65b8eef0f041ffba3525a9 SHA-256: 59ca9bd630586a5db68fff1121e6401972db87977d0e1c2ffbbe6d875f143e87
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=java+programming+language+free
    • https://static.usrfiles.com/ugd/d216cb_301b12e2b4a24e17a23a4ee09d30f7e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_34673d49eded4ce1b9fad9f5457f82a1.pdf
    • https://static.usrfiles.com/ugd/80c1db_26e4eb6032604c0682f3f5c31c721a69.pdf
    • https://static.usrfiles.com/ugd/b8c837_89ca5d07582545b3a6e3f7cf3843dbbc.pdf
    • https://static.usrfiles.com/ugd/89c6ad_fc28a9d2267b4251b86f136b3859cee7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b935660bb4b41b0a56ed5f44f4834f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_63fa5c06e79e4155b579388d06b9f5f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc7cd52579b4cd58e18835e14608acb.pdf
    • https://static.usrfiles.com/ugd/6f9b04_2744ba41ae7c4018acfd4238747bf899.pdf
    • https://static.usrfiles.com/ugd/197ed4_83e0755e6eab4854a009c367aba52a97.pdf
    • https://static.usrfiles.com/ugd/9e14ca_b5250e1e351d46d4b1e43ef1661d5d0f.pdf
    • https://static.usrfiles.com/ugd/33a2e4_395f73691cd94d8fb2482812721023bf.pdf
    • https://static.usrfiles.com/ugd/e78b77_8e5ba66e1683434b983f70943f706a54.pdf
    • https://static.usrfiles.com/ugd/b8c837_57428347f6fc468890c7973cfa0577a9.pdf
    • https://static.usrfiles.com/ugd/f967ac_1bf3977b23a844a7a554476f9a98e1b2.pdf
    • https://static.usrfiles.com/ugd/d54300_a24fcaad673b416e80091e6ed34dcc74.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095c9.bin
e5e8ed1da50b35da53beb67b32b122fee3471a644c0bb164bf2fcef1229c92ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C9 5092 bytes
font_01_sfnt_off0000a71d.bin
1b1887daa0c81c8bdace4ce483d9363c4a7c2411e34e983ff5a81a4147ed256a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71D 10224 bytes

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