Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0f2ba726dab04d…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 08:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b4bc1981ad6e162d947524fc6b4d136 SHA-1: d37f322ffbe8d5534ce5ecb325f9adad0c333da5 SHA-256: 2f0f2ba726dab04d0049fd7bb1cb6de7efd5fd2e30973eee0b4626095d2519a9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'commutative property of addition printable worksheets' and the malicious URL itself, suggesting a lure to disguise malicious intent. The primary malicious URL is https://ttraff.cc/wix?keyword=commutative+property+of+addition+printable+worksheets, which is likely used to redirect the user to a further malicious destination.

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.cc/wix?keyword=commutative+property+of+addition+printable+worksheets
    • https://cdn.shopify.com/s/files/1/0438/2900/2390/files/68413571005.pdf
    • https://cdn.shopify.com/s/files/1/0437/7611/4837/files/issb_test_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6738/files/jokiwolevib.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/kokezozexirufeveviruf.pdf
    • https://cdn.shopify.com/s/files/1/0460/2694/8767/files/76551761204.pdf
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/entrepreneurship_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/mofukip.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/34429462459.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/31357758836.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/49925401393.pdf
    • https://static.usrfiles.com/ugd/b8c837_def89ea1257645e09c74abcd83d51160.pdf
    • https://static.usrfiles.com/ugd/ac72e0_a9e5330261d94f179592cc0e40335f64.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_off00006c16.bin
3f1fab03df1f0397c582ad1684d9754294e82df7de7b5de1fd36464ef8e9efaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C16 5644 bytes
font_01_sfnt_off00007f30.bin
43b76606debaa70d9d6cae694cb22dd187c391f4e6b05c826f4fdbc51c654a83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 12096 bytes

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