Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d7e4b92f709d61…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 08:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7772c2be3ba9095c05abaa9cc8e1e7fc SHA-1: 5edca04f57491aca15c1802fe66ef48342859b7a SHA-256: e6d7e4b92f709d611bc232b095e97aeff1901637fd749c6adcaf7ef1eebad22a
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, including one pointing to a known malicious redirector. The document body, though corrupted, contains text suggesting a lure for downloading books, which aligns with the malicious redirector's keyword. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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.com/wix?keyword=livros+de+henri+wallon+para+baixar
    • https://cdn.shopify.com/s/files/1/0448/5152/7842/files/differential_equations_paul_blanchard_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5317/7237/files/accounting_for_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0461/9999/6569/files/wejade.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/dunoko.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bb0aa797b79453199425b3cda0fafb5.pdf
    • https://static.usrfiles.com/ugd/0bcf16_822c15cb286446fb9993deebd2bd7455.pdf
    • https://static.usrfiles.com/ugd/d902bb_6187e24469ae4c6d80f0698eaa6cd038.pdf
    • https://static.usrfiles.com/ugd/b8c837_020fe300be4e4cbbadafe8ae2b3033d0.pdf
    • https://static.usrfiles.com/ugd/5de1df_45365967a2484c7f8e6f5a256e89db57.pdf
    • https://static.usrfiles.com/ugd/b8c837_115ae9c193484922906247c9ee7ae7dc.pdf
    • https://static.usrfiles.com/ugd/d01287_688b9a3a73f640c08564e2bc4daa6736.pdf
    • https://static.usrfiles.com/ugd/b8c837_6741f90b353c4d09a2050c093fafc4bf.pdf
    • https://static.usrfiles.com/ugd/5b9365_acbf2cc0407b41ef89695fba6ad94051.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7a857dc0c504b479524203800e8996a.pdf
    • https://static.usrfiles.com/ugd/51c472_8cee68fe12444c469740496304e12ead.pdf
    • https://static.usrfiles.com/ugd/bf650e_c6a747a2a1a349a28d958c72456df362.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_off000060dc.bin
4d4ecc04daf5a1a37997e3426bce40923e3a39fda9c0b2f4a7cc02ef159c89b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 5348 bytes
font_01_sfnt_off0000731c.bin
3cd9ed1de920b08d5c54dd2db0b110f61ecf818bac6faf8e67bed81f65a0903b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 12420 bytes

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