Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f3d16fcc66b06a…

MALICIOUS

PDF

40.8 KB Created: 2020-09-16 13:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b5fa0781a91797bd8b87c40da3bdd8 SHA-1: 1ec0c0b5e58bdac5cf71f39f442cd9c155c02371 SHA-256: 58f3d16fcc66b06a4e03ca95da5e8fada7470e696d6101009325ef06343e75b0
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. The primary malicious URL, 'https://ttraff.club/wix?keyword=roblox+unblocked+free', is identified as a malicious redirector. The document body, though heavily corrupted, contains the same malicious URL and keywords related to Roblox, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=roblox+unblocked+free
    • http://files.audibleye.com/uploads/1/3/0/9/130969206/b959ff35a.pdf
    • http://files.cypressuniforms.com/uploads/1/3/1/4/131455680/serigotujuzetap-lulusubatex-dozuliwunopaxu.pdf
    • http://files.sterlingreputationspr.com/uploads/1/3/0/9/130969489/giwekujisus.pdf
    • http://files.brigidcoleridge.com/uploads/1/3/1/6/131637137/398430.pdf
    • https://cdn.shopify.com/s/files/1/0429/3296/1439/files/aditya_hridayam_lyrics_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8737/1167/files/vasokumategogalakupigazez.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/mizovikitaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/61729165776.pdf
    • https://cdn.shopify.com/s/files/1/0430/5243/3557/files/83852086679.pdf
    • https://1a91a79e-f885-43c3-87b0-d64624f4ed16.filesusr.com/ugd/d6af85_8633ec0c4ccb47e995b29b64dcc5eba7.pdf?index=true
    • https://6e1f3a07-fbca-4b64-9b32-aa36bb7cb11e.filesusr.com/ugd/610d21_ce0cd0c2e1dd4c5baa28df9691664373.pdf?index=true
    • https://235fd3b6-c81a-4169-be92-020b64e254af.filesusr.com/ugd/2994dd_93a104e0b6da43428e445225d401fef3.pdf?index=true
    • https://3e2af481-0ae0-4842-a3fa-1b07beb6c7c8.filesusr.com/ugd/d6af85_95d4f4135b9040b6bd443daf869c1b0f.pdf?index=true
    • https://1398cfc9-232d-4419-be97-da0fa905dff8.filesusr.com/ugd/5bb01c_abe4b2f2a18b4415b27735d9b50d8d81.pdf?index=true
    • https://94aff95d-55d3-446c-b0c6-7efdb45c0e13.filesusr.com/ugd/bf650e_ccd98a6a714244e684ff5b7d9831d710.pdf?index=true
    • 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_off0000630a.bin
842f4ce85a40944a4bb76186026f299cc41e3e919dff62e036fb7f6b61dcd5c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x630A 4908 bytes
font_01_sfnt_off000073d5.bin
ff503f0f82628b415ddbd1cff78c249d6b2935e010745913669ba1068bd62d3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 10052 bytes