Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60b30a4d6bdc3b3…

MALICIOUS

PDF

39.3 KB Created: 2020-08-28 23:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ffc7a01d789a2d5bf95f4ea88c01385 SHA-1: 14a4f91dd1bc05559b4c38d3370c1e511539e028 SHA-256: f60b30a4d6bdc3b3a5fa3a6a23441b22121284a78e4c6377d1182df52dcdec4e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One of the primary links, 'https://ttraff.ru/wix?keyword=air+conditioning+and+refrigeration+r', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be generated by wkhtmltopdf, suggesting it was programmatically created to host these links.

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.ru/wix?keyword=air+conditioning+and+refrigeration+r
    • https://static.usrfiles.com/ugd/b8c837_f0d9ea0f57004c04b51958ec8cf844ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b29095131b647f2a26fc780a904d88b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fc11c3a676642a194389e4fea123cbc.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7700/files/tuwikagupaxafane.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/lukewonig.pdf
    • https://cdn.shopify.com/s/files/1/0439/5896/0286/files/danganronpa_v3_nail_brush.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/hsc_zoology_book_by_gazi_ajmal_free_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_c29ae1bceaaa479c8e4ea670a18e14fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_9336957ca8c0459e9f0b73704def7569.pdf
    • https://static.usrfiles.com/ugd/b8c837_e17f5444ee2445dbbd3d9962f5a52bed.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d928d30a28b4f8c87529791b03cfff4.pdf
    • https://static.usrfiles.com/ugd/b8c837_16b52d1e7e444b0396e282047c1fca6e.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_off00005ca6.bin
b7a777f7b7e2dde1b38a69d22842cc068794a11816325b5e5e95f3b13ffcc62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA6 4968 bytes
font_01_sfnt_off00006d91.bin
706f27b7ddf053ae3f21795963f30876853c9672515bd57f27010952a277421c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D91 10556 bytes

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