Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde8b9de429bb385…

MALICIOUS

PDF

56.5 KB Created: 2020-09-02 23:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff054dd7bbeda31b5cd7bcf7d1f5473d SHA-1: 504705a456222a9f9ebb4ae4923d8adf07f09f8e SHA-256: fde8b9de429bb3852565cddb4c236fbddee27f0fb9bf91b43d9f2fa7bd1b66a5
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=40k+codex+pdfs', which is flagged as malicious. Another heuristic indicates a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0432/6886/6212/files/develop_android_apps_on_mac.pdf' being the first listed. The primary attack pattern involves tricking users into clicking these links, likely leading to further malicious content.

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.club/pify?keyword=40k+codex+pdfs
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/develop_android_apps_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/acetil_carnitina.pdf
    • https://cdn.shopify.com/s/files/1/0463/2438/3904/files/robotica_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/zinunesomizok.pdf
    • https://static.usrfiles.com/ugd/516574_c6c80d2f3e0448c4954679e2e0c7ec7a.pdf
    • https://static.usrfiles.com/ugd/e3ff21_e335df3d271d4739ac17f4be7c066dc1.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_dd7e7cb78d624f4dbbd540c78a0753d7.pdf
    • https://static.usrfiles.com/ugd/34ec99_7ef465dcf762475381ca763d67b7875f.pdf
    • https://static.usrfiles.com/ugd/b8c837_344c2116375244afbd20eac82e2cce46.pdf
    • https://static.usrfiles.com/ugd/724bd4_2ddfdd31463a40819da7a537200842ea.pdf
    • https://static.usrfiles.com/ugd/738632_4372702b0abc420ba2e51767b8ceb913.pdf
    • https://static.usrfiles.com/ugd/f65175_c380f2f5ea1b42fe8e264a332712c3c7.pdf
    • https://static.usrfiles.com/ugd/6f7357_c592c574fb1146ebb94455a8bf2e48f9.pdf
    • https://static.usrfiles.com/ugd/e2c223_0a45cfa81b3841b980b954e60efe1cce.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_off0000955c.bin
cfb7554e427595f8d26b29887e250088bbadf51e924cae846d1cbfbdd163f50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x955C 5080 bytes
font_01_sfnt_off0000a6ce.bin
36e55b2bbed81a41901ceb42bd65b256ddfa3aad1f0e1b8f39813d9e68f02f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CE 14956 bytes

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