Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf96db40be984a6…

MALICIOUS

PDF

35.5 KB Created: 2020-09-08 07:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d01335e1176be843e1a533de61bc784 SHA-1: 21eebb695239eb44a8f527c06c7560ea9b50031b SHA-256: ccf96db40be984a6ed16a135fa1bad82f2788c41b2ad72208a77350c5d9f2d00
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=dna+structure+and+function+review+worksheet', is designed to redirect users to malicious infrastructure. The file also contains a PDF link farm heuristic, indicating an attempt to generate traffic or distribute content through numerous links, many of which point to static.usrfiles.com. The overall pattern suggests a phishing or scam attempt using a seemingly innocuous document to drive traffic to a malicious site.

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.me/wix?keyword=dna+structure+and+function+review+worksheet
    • https://static.usrfiles.com/ugd/e3ed1f_ffbed09efd2048239d09389565cbc219.pdf
    • https://static.usrfiles.com/ugd/185811_d7e55aced4484e50a8baaa23bcd8c6b7.pdf
    • https://static.usrfiles.com/ugd/d48fe3_efa4024cac9442c28e9add9a44d1ca00.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/15090788289.pdf
    • https://static.usrfiles.com/ugd/d54300_841093b1f2374f9dbbbcacd0849ba6b9.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_e4f2c0018f48461faeb4d0afe119fe17.pdf
    • https://static.usrfiles.com/ugd/72b0e7_7a94d2083eeb45a0ae0ecfd9ddb2d652.pdf
    • https://static.usrfiles.com/ugd/01bc73_5305ec272ed542889ba2d95e45f3c1d3.pdf
    • https://static.usrfiles.com/ugd/b914b5_90abba1157594080ade354545778a832.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/que_es_gramatica.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/88174588723.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_off00004d49.bin
9cc1c2ff51b455f97b02e018c83cb8f7884582ae9202bea403f6343512a778f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D49 5292 bytes
font_01_sfnt_off00005f60.bin
38b353d35ee3a7bc9c8ce84cb6611c613e5f80db6ce6b0898a7d1ce57f20bd7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F60 9988 bytes

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