Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b69f581a56f170f…

MALICIOUS

PDF

47.8 KB Created: 2020-08-31 10:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c48c46eafacbb6d356a3114cc0deac3d SHA-1: d3022729475d7ddafcbd678a6559defee25e308b SHA-256: 3b69f581a56f170f820418893ef0fae53b83ac025bdccd2841dc0a96241d67ef
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to a movie title and URLs. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly suggests the intent is to redirect users to malicious content. The presence of numerous Shopify links, while many are benign, contributes to a link farm strategy. No scripts were extracted from this sample.

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.me/wix?keyword=a+separate+peace+movie
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/lozijufepelup.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/71080569153.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/rivepu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/89956432307.pdf
    • https://static.usrfiles.com/ugd/ae15ca_d6bdc5e8f8d74cc98729cf604f706e95.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_25bd4b9fffc041aebdaa491b6c92ca9a.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/critical_care_transport_field_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6262/files/taxunijibosuvasawatosiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/66230864452.pdf
    • https://static.usrfiles.com/ugd/b8c837_5671c48fa6b54474b557c66f84927911.pdf
    • https://static.usrfiles.com/ugd/6c98bc_6d59b9aa3fd04b7fa50d3dc69b6e655f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b818b6c3533a4e4dbe5128b69367856b.pdf
    • https://static.usrfiles.com/ugd/837d34_355e3911006a400586b93bf17b08a713.pdf
    • https://static.usrfiles.com/ugd/b8c837_592744d225244478a94965510ff659f8.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_off000070f0.bin
1a74ee63d8edbce7382e5d14993287a5a608f1031f0e7882e8a125de9a6326a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F0 4780 bytes
font_01_sfnt_off00008129.bin
bf8a9ff542a5675232594858b62a76d540a3e3310d466e5cd419fa1812a6b44b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 10188 bytes
font_02_sfnt_off0000a416.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA416 4324 bytes

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