Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce91fd6971e2e7c…

MALICIOUS

PDF

39.9 KB Created: 2020-09-02 18:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d9dda313231b9c85db3ac017060e5c7 SHA-1: 5ad7a7ecff869a2bc22717814498d03985355dda SHA-256: cce91fd6971e2e7cc8d0fba594064a8b870850fc4762a048de9a4da73a06fa18
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=geometric+mean+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Another critical heuristic identified it as a PDF link farm, suggesting a broader SEO poisoning or spam campaign. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector URL is sufficient evidence for this assessment.

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=geometric+mean+pdf
    • https://static.usrfiles.com/ugd/3ceeb9_13a3e7dc81634ed382121d1104e385ac.pdf
    • https://static.usrfiles.com/ugd/f967ac_f66ed556f13649d3ba3b1418f698eba4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fc8fa00ffa9422d9573937e99067c4f.pdf
    • https://static.usrfiles.com/ugd/71fd01_7c05b6c3138e485da8396e806fc04017.pdf
    • https://static.usrfiles.com/ugd/a18aa6_91125ff871014f48934019766540e09d.pdf
    • https://static.usrfiles.com/ugd/5de1df_44cdc0e0c5954646a07e38af62e9554c.pdf
    • https://static.usrfiles.com/ugd/ac51ce_22c74d561d754555b8d508ad6de8d393.pdf
    • https://static.usrfiles.com/ugd/defdb4_933a2fc58a34400b8b4e570c4b9fc350.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad01e4458ed1442e9f2792d5686f9ff2.pdf
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/apple_music_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/bunefabibibokuwav.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5cd7b02488f4d298ef00202ec2908f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_8926cb24f2cd4d9fb398c5bd1dd74ef8.pdf
    • https://static.usrfiles.com/ugd/e5a943_c2cbd2d6c7564203996680f244f22d74.pdf
    • https://static.usrfiles.com/ugd/32777b_cd889e91049341a8940001ee2cd61873.pdf
    • https://static.usrfiles.com/ugd/6c98bc_2e94e066127e4a528013675ba3cd2a47.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_off00005d7a.bin
67f455b7ce2d26d0051084b78dec4c41eb4d9ef2091147e078e72a22b9ce354b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7A 5120 bytes
font_01_sfnt_off00006ed5.bin
4fff019cb2595e62ec1234be59b4f324c975a7b5827fac8d27c39a62f4f996e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED5 10644 bytes