Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1a25c11dc42852…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 08:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95793244a8e0da6e5b372911ff3badc3 SHA-1: 182e777bd90958fd1caaf43505c685a574b33788 SHA-256: 3d1a25c11dc42852c0f6dd9bde84fb9960e5a52917e2568b83d7366dd75ab18c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. This suggests the PDF is designed to trick users into visiting malicious infrastructure, likely for further exploitation or credential harvesting.

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.com/wix?keyword=skyrim+pee+mod
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/67225071721.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3944/files/solving_absolute_value_equations_worksheet_with_work.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/vonafonivevefipixopilet.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_a3306dafc58d4c39a2193b2d023c0caf.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_60c52c18ac314ec1bd6534ddb8b469d5.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_71806a859e47498da7ab7549d3ab699a.pdf
    • https://static.usrfiles.com/ugd/0baf77_a57ca78d58e34ef2bbce0d7d228b744e.pdf
    • https://static.usrfiles.com/ugd/37428b_465e63d628d84782bcc4720e1abeae01.pdf
    • https://static.usrfiles.com/ugd/c068f8_781efecea1c94459b5d95eefe1cab7f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_04cff1fba101469d8086848e1e7b3807.pdf
    • https://static.usrfiles.com/ugd/b11f6d_bfa065bf2d5241feab3ac8e55e257f37.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_ce3950f839444947bd17646611cd05c1.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_off000063d8.bin
a52a9d061b0ee8a56f3c22871eb75149e9b60c48c1261a4f122529c24e5b0113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D8 4956 bytes
font_01_sfnt_off000074a5.bin
6992e53488a298f6f2ad7284f8215fa1bed3ab55351dad478185620ec0452edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A5 10140 bytes

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