Malicious PDF — malware analysis report

Static analysis result for SHA-256 da73a82e60203cce…

MALICIOUS

PDF

31.4 KB Created: 2020-09-05 20:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a7023a2eb27f7cc6d3d36b01475caef0 SHA-1: 28193b5da7965c8273d5fd950ee0230b3b0490c7 SHA-256: da73a82e60203cceaa9dc7ab6dd1c7ca7fdccc7221dd1096a67337554bc3bfff
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious URL, indicating an attempt to lure the user to a malicious site. The PDF also exhibits characteristics of a link farm, suggesting a broader campaign to distribute malicious content. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=boat+trailer+guide+post+bracket In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b5aed9_8bab3e903d3f4dfa871a37caafe345d2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/69b86f_33899f902f35482d9e781dbafd506406.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/17159d_e0903017270a4d0eb08f23aba92dfac3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/98059629632.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5844bef1d722463685ebc3e8c95d2e04.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d94ae5_9adb56e807a1409f8619fb2dfe664891.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/20d83a_ea1646e933664632ba262c8015338f91.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3ab5ed_332df32fa93940b79724f13ad7b6264f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0fdb6d_5d9f948c8e2e4c4db51265e83c84948d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d94ae5_3a3a101c2d57470f96c6fda202f04c85.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000583a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583A 5272 bytes
SHA-256: 755af5caa63a56e33e6a1ba12fb34e304fd5841248b67a56a819133f93849870

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