Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff4f9f3bf73fb62…

MALICIOUS

PDF

47.5 KB Created: 2020-08-30 18:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bac1d97687cce0cde9938f9d9012f1e2 SHA-1: 0a5ab358c7902abe588978b1e1eac7379cc9ab46 SHA-256: 9ff4f9f3bf73fb62c6a1aa15f91acc706c75c37cd0b6858ea95fc0f0392bff10
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 pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL. The primary attack vector appears to be social engineering through a deceptive link.

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.com/wix?keyword=metabolic+renewal+hormone+type+6
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/toxekeperozamup.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/winox.pdf
    • https://cdn.shopify.com/s/files/1/0459/9123/1647/files/listview_with_adapter_in_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/42834187997.pdf
    • https://static.usrfiles.com/ugd/b48b60_e6cfd4de9bbc42429ed0344d42840703.pdf
    • https://static.usrfiles.com/ugd/b8c837_de39db9160a14e5b852ed7e15ec69196.pdf
    • https://static.usrfiles.com/ugd/8cbfce_94fce2f9d190423db363e0d41c6b0f2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfaa338034b746f7a4c2e5beacc168d9.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/30832941504.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/cake_making_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/3773991864.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0501/files/vudado.pdf
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/australian_super_letter_of_compliance.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/detalinevo.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/
    • https://cdn.shopify.com/s/files/1/0432/8862/5

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bb7.bin
22e675ace0e0e9eb38082d0e7eedf1b739d01aa24be8b59a34408b9806bf07b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB7 5488 bytes
font_01_sfnt_off00008e51.bin
5b3cea2aa396c81b8db68c5fefc598cc46b99f9c82d970851b00331e7ca04b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E51 10224 bytes

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