Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ba2f9dca92c476…

MALICIOUS

PDF

43.0 KB Created: 2020-09-14 04:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e981735ea39b96653714a3d79268479 SHA-1: d7a3c1eb665bb2cd54cd97cd5a316cd5f98421fa SHA-256: 25ba2f9dca92c476a59d308333779845799c9711a96073a233718d9a94bcd9f9
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=cleanblend+blender+review'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on cdn.shopify.com and other domains, suggesting a link farm or redirection strategy. The ML classifier also 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.link/wix?keyword=cleanblend+blender+review
    • http://files.wmspto.org/uploads/1/3/2/3/132302859/3b68641a31.pdf
    • http://files.thebrockenhursttaxis.com/uploads/1/3/1/8/131856995/8745095.pdf
    • http://rutesevod.milwaukeetoireland.com/uploads/1/3/1/4/131438216/1446916.pdf
    • https://static.usrfiles.com/ugd/120f26_2031c18da0de4801a19816b6f40358b3.pdf
    • https://static.usrfiles.com/ugd/2b98a3_3833856042e24c10ae21b4729187c392.pdf
    • https://static.usrfiles.com/ugd/03a576_4b07ccc166b041278ecec263261c9a30.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/wetherspoons_menu_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/dibivuxuvexaxekegowas.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/razudifazeba.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/bully_apk_70_mb.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2661/files/65594090802.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/36595349850.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/bg2ee_mods_android.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_off00005f88.bin
1c82c58e4e67b3ec30ca0801c549259c3684f8821c5d3193b00419b57bb5fbe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 4552 bytes
font_01_sfnt_off00006f09.bin
1f3b7541fccf5d32345c65bb05dda11893d9afd8989912f537b8745357c59050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F09 10076 bytes
font_02_sfnt_off00009172.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 4324 bytes

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