Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff95ee92ff327447…

MALICIOUS

PDF

34.6 KB Created: 2020-08-31 00:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc381f83b525168b3ededaced290b191 SHA-1: b5b0c73fed404cf3ce0e9aa2f9fb39880adf2605 SHA-256: ff95ee92ff3274470d0b50ef639164f1ce7b43bcb67640a77433cc064cef1370
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=escape+from+tarkov+door+keys', is designed to lure users to malicious infrastructure. The PDF also contains a large number of external links, many pointing to benign Shopify URLs, suggesting a link farm or SEO poisoning tactic to mask the malicious redirector. 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.link/wix?keyword=escape+from+tarkov+door+keys
    • https://static.usrfiles.com/ugd/b8c837_67eb5d5703fc4132aa067bcf59a9372d.pdf
    • https://static.usrfiles.com/ugd/b444d4_5115c76bfebd4018b731c5f103f9eeca.pdf
    • https://static.usrfiles.com/ugd/b8c837_311f7dd521204dd58dfe8bf5f63acd8d.pdf
    • https://static.usrfiles.com/ugd/7baf93_24decd35e31845ff981bc107d93e0199.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/kawasaki_er6n_2020_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0462/6985/7941/files/facebook_lite_latest_version_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/5784/8224/files/pevowakopaduloten.pdf
    • https://cdn.shopify.com/s/files/1/0440/3403/1766/files/icloud_windows_10_all_photos.pdf
    • https://cdn.shopify.com/s/files/1/0461/7558/4419/files/vocales_para_colorear_animadas.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e6bf3b3035049a89c9556b8d2cab052.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f101c8895c3488fb6efeae3b08f62b0.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4719/files/javascript_convert_utc_to_local_time.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/tuxufakezinafaligore.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/tebeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/1379262685.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_off00004a99.bin
30a2047f9181661f297156104671df6a8a505cedc67e817b2cf02a13bf84d0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A99 5452 bytes
font_01_sfnt_off00005d1b.bin
045cf8225b60d116231b4358563d395e11690894da69e4cb258568bd571da355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1B 9628 bytes

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