Malicious PDF — malware analysis report

Static analysis result for SHA-256 569d92774fec30bf…

MALICIOUS

PDF

54.4 KB Created: 2020-09-02 22:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6214e3660c1e13f0ea379d123e05a7f SHA-1: c6482294396ae28c63fb0928e805aa3bb51d2453 SHA-256: 569d92774fec30bf980af436c6f66795da444adeefca404b652c5bf5270f7920
150 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.me/wix?keyword=assamese+sad+poem'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely to obscure the malicious destination. No scripts were extracted, and the family is unknown due to the lack of specific indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.me/wix?keyword=assamese+sad+poem
    • https://static.usrfiles.com/ugd/54fa57_bb50c10e1f594de0a33d89d6f152c110.pdf
    • https://static.usrfiles.com/ugd/b8c837_f65864bab259482086ab617609879f25.pdf
    • https://static.usrfiles.com/ugd/7041e4_fa270dee36a9498ca0b87bbf6a375fc1.pdf
    • https://static.usrfiles.com/ugd/a76634_06a8ecc642944f3d9d3ae9511c90edb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5755428e24941d897f5bc3441f85da1.pdf
    • https://static.usrfiles.com/ugd/7f46b5_e65689f666cd46f3bc920443d521ed7a.pdf
    • https://static.usrfiles.com/ugd/ea78e0_f8c648fa569940d4a4a696dffe582d07.pdf
    • https://static.usrfiles.com/ugd/b8c837_496c8eb36ba64e1a8770a0d32e39d74c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4e5ea3fad004ec3a29dbe9c4c9eb0f7.pdf
    • https://static.usrfiles.com/ugd/3aca14_adb8ac375c2e4dc585468af209f4e5f0.pdf
    • https://static.usrfiles.com/ugd/238140_374aca46d4b74c62ad3f33fcabbb9f75.pdf
    • https://static.usrfiles.com/ugd/6290de_628bd56e17654a4db7e2689095288944.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60f0e16c4c7435696cc43e21fbc263b.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_off0000500b.bin
919369e1e3a16eaf807ddf2646ba9778c813a45b96f30713e67cfbcd349f3b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x500B 4964 bytes
font_01_sfnt_off000060dc.bin
864f9d295f97a820545861a62e4a2306f4aadb1132355eb095eede25754baafe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 9660 bytes
font_02_sfnt_off00007fc7.bin
dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC7 1796 bytes
font_03_sfnt_off00008851.bin
0902ca83b6d5e12ceb04bca04490b785c42644c3016a6fea053894cb67b6aa20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 13900 bytes
font_04_sfnt_off0000b3e4.bin
f01dd375bc4fa78571795e2868e7c256eb9dc15f7d920b486ea4d83b33b51321		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E4 18484 bytes

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