Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45cf08ea0a435fd…

MALICIOUS

PDF

47.7 KB Created: 2020-09-06 15:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6896bd1bc118e40e946659fc10043458 SHA-1: 04e7715cf6e8bc649774a291e440e0a496eac73c SHA-256: e45cf08ea0a435fd1120fa0b0873b55b29280642993377c3eda37aa559f14c93
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=introduction+to+higher+mathematics+pdf', is designed to redirect users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, likely for SEO manipulation to increase visibility.

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=introduction+to+higher+mathematics+pdf
    • https://cdn.shopify.com/s/files/1/0437/5435/6897/files/80575767695.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/2893048308.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/cfit_alar.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/58941257921.pdf
    • https://static.usrfiles.com/ugd/de65f7_c7a878fbb86d475293963aff81f81bf4.pdf
    • https://static.usrfiles.com/ugd/fafc38_96755a4d81f84cb1b0cc2a1751bd4a86.pdf
    • https://static.usrfiles.com/ugd/696b8a_3a4a483862e143e9ab2834170af10909.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_bd3c7f1841ba4d8d852dd377f04bf124.pdf
    • https://static.usrfiles.com/ugd/07ef24_547df3713b274c3d8be99abd09629080.pdf
    • https://static.usrfiles.com/ugd/e4a001_d0c334f79c084cb1aef3146dede4646e.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_off000065c0.bin
a3bf7540a6da023dfba8aa2c97382b7d5a589b7e8f97b00e43afa051c6c0c322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C0 5476 bytes
font_01_sfnt_off00007830.bin
3e7cc2dbfa33d9e5022a84ad618f5fddabec8329cd92d1e1c889facebc6a278d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7830 10536 bytes
font_02_sfnt_off00009c8b.bin
0865261ead4deb3fdb9dd3f958f02ea4f77570cd43e30a4de717954656c41905		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8B 16220 bytes

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