Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8d9d6d02602e04…

MALICIOUS

PDF

39.0 KB Created: 2020-09-01 05:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 443de276f31b33b1392f090f55200b42 SHA-1: d68cd08200f56bf7af732a08b19eadb72830c053 SHA-256: 8e8d9d6d02602e04fb409f7440db5716de30332095770bbb6c17a7e01c2a1114
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=bs+rajput+mathematical+physics+book+pdf', is designed to lure users into clicking it under the guise of downloading a book. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to benign content but serve to obscure the malicious redirector.

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=bs+rajput+mathematical+physics+book+pdf
    • https://static.usrfiles.com/ugd/cbdbb6_fb02efeea1da43b1a5560b5b164fe5ad.pdf
    • https://static.usrfiles.com/ugd/91e123_d0475e9508cd474291beb8b2b1cfa7e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcfc4d8cba4c48ff8fe3ac28ba049124.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0328a08538c460e8b0451d8c349ddf8.pdf
    • https://static.usrfiles.com/ugd/739437_b6ce0c70d1354e6fba6b3dee219b8de4.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/the_illustrated_man_summary.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/catchment_area_definition.pdf
    • https://cdn.shopify.com/s/files/1/0449/7843/8302/files/74629221173.pdf
    • https://cdn.shopify.com/s/files/1/0437/0894/0441/files/tecnica_de_anestesia_general_balanceada.pdf
    • https://cdn.shopify.com/s/files/1/0444/4202/6150/files/introduction_to_anglo_american_literature.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/kosupajakikixusesep.pdf
    • https://static.usrfiles.com/ugd/df4650_6c469bb3563541caaa82d0c924546343.pdf
    • https://static.usrfiles.com/ugd/3d0627_cfb121a5cd9f4963b14749baf339164b.pdf
    • https://static.usrfiles.com/ugd/c068f8_6efdfad1bedc4efdbf45285278ca2614.pdf
    • https://static.usrfiles.com/ugd/b8c837_375c03069b3d4bc0bc11542149eb8ceb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004592.bin
60bd1d3520141ebbe17445d0527ea5c9a3eefb227f0d611d901355655bc24f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4592 5828 bytes
font_01_sfnt_off00005952.bin
761222306c217403a20ba7f897215fa7b6295a4f08196df03f7cad5fe31be935
pdf-font-stream PDF embedded font (sfnt) at offset 0x5952 9412 bytes
font_02_sfnt_off000079af.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x79AF 16164 bytes