Malicious PDF — malware analysis report

Static analysis result for SHA-256 22aed618b2973e19…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 01:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f00a23229dd55939661ee518420faf2 SHA-1: 3d0d76525ada52e6901bdc6126de8af4ab3f64fe SHA-256: 22aed618b2973e192e50f3c57e66d8ac18bef96ff6be7581100d067bbd2c472e
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=area+of+regular+polygons+worksheet', which is the same URL identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This suggests the document is designed to trick users into visiting a malicious site under the guise of educational content.

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=area+of+regular+polygons+worksheet
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/28951422379.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/77336286950.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11085861466.pdf
    • https://cdn.shopify.com/s/files/1/0460/0781/2257/files/kadexorejuw.pdf
    • https://static.usrfiles.com/ugd/0df15e_f6c4902122f64f7ca21fd2c9bdf2d7bd.pdf
    • https://static.usrfiles.com/ugd/26938b_0f9beeee109d419f9cbe48358b6d2bdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_104429310784427597f36086697bba8f.pdf
    • https://static.usrfiles.com/ugd/bb13a2_01c147f0c9154e249b78616180c30f84.pdf
    • https://static.usrfiles.com/ugd/b8c837_7cb249e18913408192493da6e1c30e36.pdf
    • https://cdn.shopify.com/s/files/1/0435/5053/9940/files/najuxomavotok.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/livefilarugapisedaso.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/26866597808.pdf
    • https://cdn.shopify.com/s/files/1/0464/6800/6040/files/6323253473.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/59976394122.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_off0000614f.bin
d6793345cfe84abcd6536a87fe283d773b3b8d165fa17fa74a0cb4739646dc5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614F 5408 bytes
font_01_sfnt_off000073cb.bin
5eb1229cb50164ccabcc49964ecd8f82ba791ee5e1c0dcd8f01d5faab25306ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CB 10440 bytes

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