Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f115d6dbb129a92…

MALICIOUS

PDF

37.1 KB Created: 2020-08-31 17:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed98ff795fda958140870d11716db2c SHA-1: 76e4339466d0bf75f1cd1ade4957b9bcb1bd53a9 SHA-256: 7f115d6dbb129a926e2da68cc787b6f6e1f9248cf0977c929e647bafa3e8cddb
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.link/wix?keyword=os+axiomas+de+zurique+pdf++gratis, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains references to PDF downloads and the redirector URL, reinforcing the lure. The heuristic firings confirm the presence of malicious redirector links and a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=os+axiomas+de+zurique+pdf++gratis
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/dozutelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/ismail_industries_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/trey_songz_album_zip.pdf
    • https://static.usrfiles.com/ugd/b8c837_09b453a9940544f2b6c67044e154fa97.pdf
    • https://static.usrfiles.com/ugd/b8c837_b53e9525bd1749be8c2034ce0e38c3fb.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_0d63dd8a40e3480da3e1060915b20cee.pdf
    • https://static.usrfiles.com/ugd/9eb187_1ac50d85097f40d387d309d77124e939.pdf
    • https://static.usrfiles.com/ugd/8ab72e_cd3af11364c84a13979b817c7a0d9960.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9878/files/energy_code_ace_trigger_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/char_broil_commercial_tru_infrared_4_burner.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/milisufimifukukome.pdf
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/28861822483.pdf
    • https://static.usrfiles.com/ugd/e32576_ad6cdde4a9c84b7e9299b8d26f4b92a7.pdf
    • https://static.usrfiles.com/ugd/c3f59f_547d262b4eb64b6781b65582cad98db8.pdf
    • https://static.usrfiles.com/ugd/0c268c_3df0d0dce4ac4626b27866e8ee5b58c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a24cee329544235af70991f2c28d87c.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_off000045c3.bin
cbd8d88d8936048c5d00b6ef0392dbc629ff4644caec4c1841b3e95100d326a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x45C3 5376 bytes
font_01_sfnt_off00005817.bin
8a68fc630ac821230b743f50693308f9d1be250a3eda7951500418bd1def8844
pdf-font-stream PDF embedded font (sfnt) at offset 0x5817 9760 bytes
font_02_sfnt_off0000798e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x798E 4324 bytes