Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e28f50791d2771…

MALICIOUS

PDF

39.2 KB Created: 2020-08-31 23:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f7040178118f3d57ef543c3ad24a53 SHA-1: f6267122475d424eaae4e20b3243410b12bac95c SHA-256: 55e28f50791d27710d4beccfb3d4eaff93363da7576ff09f31a2644e4c2d70c8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://ttraff.cc/wix?keyword=bandeya+ho+ringtone. The ML classifier strongly supports the malicious classification.

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=bandeya+ho+ringtone
    • https://static.usrfiles.com/ugd/ee6770_fe29a16b2b5e400f89193c91301d3648.pdf
    • https://static.usrfiles.com/ugd/b8c837_e152ae9b6e3b4857980a9bbd5936e161.pdf
    • https://static.usrfiles.com/ugd/b8c837_af64b28627cd4bec8224d9ecbae77549.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/7313895225.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5187/files/57360504820.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/vuzogamakezerasopikoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/wowekez.pdf
    • https://static.usrfiles.com/ugd/05900a_3e0f27679680413eb31884c7baa317b7.pdf
    • https://static.usrfiles.com/ugd/e2b09b_9c2ca05ac00440cb8f279bd193a55745.pdf
    • https://static.usrfiles.com/ugd/902d29_9fb5cc53ac2c48e99504fa88d39af716.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_off00004653.bin
5220a36b0dbfac97bb6d0cdfaa59ff2d3aad6d00ece3a056f6350d892f8f1d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4653 5028 bytes
font_01_sfnt_off00005772.bin
28b9d293dcb6257829c609f009832691de0a8c4567e98cc6a8bb567f646c5ba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5772 9776 bytes
font_02_sfnt_off00007938.bin
702db90d42636ecfbb1414188bfcce8466f506840e16ce24213d65cd16988d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7938 16752 bytes

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