Malicious PDF — malware analysis report

Static analysis result for SHA-256 d794d4fbe9b273c4…

MALICIOUS

PDF

40.5 KB Created: 2020-09-01 11:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5e160c4d67dc7edf9b300be6efaff3b SHA-1: c09d0daa09f45b22bba4cf68a157024ddbd9c478 SHA-256: d794d4fbe9b273c4a09fcb0887aad741374307cc3948dd950c78dbf2bc34920d
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 related to a 'Queens ny real estate market report' and includes the malicious URL. This suggests a social engineering attempt to lure users to a malicious site under the guise of providing market information. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF.

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=queens+ny+real+estate+market+report
    • https://static.usrfiles.com/ugd/4c76bf_0de2044388c34752b90d555eaf624bcf.pdf
    • https://static.usrfiles.com/ugd/18f527_395e094ca93f40a1984a4720ba642e60.pdf
    • https://static.usrfiles.com/ugd/b8c837_b880260303124c3ebfbdd386b1fb8ee4.pdf
    • https://static.usrfiles.com/ugd/6f7357_9e06c450e1da4d98872e3e507c960f4f.pdf
    • https://static.usrfiles.com/ugd/91e123_79a1cd122bec4462bf4f126b6f49050a.pdf
    • https://static.usrfiles.com/ugd/7041e4_6a16eb72f4474350ba7a50ec931bf578.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2cebcae217b434ea6de0aeef9b1e0b3.pdf
    • https://static.usrfiles.com/ugd/50c35f_0db1a242d888489b9d0f4d03b866b47a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d57a875f48484ecb9c7ba2770793a251.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbcdd66fa46440fabbe87efdfb1d3b1.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_off000060a4.bin
c227e3c937815ab1267a02db1eebd43af5c048c7bcc4545d2781ec5e3755baa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 5192 bytes
font_01_sfnt_off00007241.bin
a735c0e9a9e2bd110c241aed625fa68078fc19aacf18c512057c9a9635b4ea85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7241 10364 bytes

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