Malicious PDF — malware analysis report

Static analysis result for SHA-256 c610e27e2c811837…

MALICIOUS

PDF

73.0 KB Created: 2020-08-08 21:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8376b106a647d18b988510516aa77475 SHA-1: 5659d362306f8c9571704438a3bbcc71116cf371 SHA-256: c610e27e2c811837606a01fed764c83b802cffe9fa64ee7c18cf0bedf61bb193
160 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, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Cdc pneumonia vaccine guidelines pdf'. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm designed to obscure the malicious redirector. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be intended to trick the user into downloading and opening a password-protected archive, which is a common tactic for evading initial gateway scanning.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=cdc+pneumonia+vaccine+guidelines+pdf
    • http://ripefaxa.wildrelys.com/uploads/1/3/1/6/131606407/5852591.pdf
    • http://files.lorettacrogersnovels.com/uploads/1/3/0/8/130813516/452710.pdf
    • http://files.bleststudio.com/uploads/1/3/1/6/131636825/vekepulipad-kenetuxab-woluluwoguzid.pdf
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/80844184877.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/buligotamuwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/49703457281.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/23374492732.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4453/files/41559786803.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/56065064055.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/variable_independiente_y_dependiente.pdf
    • https://cdn.shopify.com/s/files/1/0430/3080/6679/files/duwededotizomexivudofuse.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/sigejasezebedip.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/bacteriophages_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/54420300502.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/canterbury_tales_pardoner.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7b3.bin
129a38097bd5bac9ea60f4d45b69102b9aec14b067eaf61427a34a6b384cfd0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B3 5344 bytes
font_01_sfnt_off0000c9cf.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CF 1800 bytes
font_02_sfnt_off0000d25c.bin
1491ba1a5491455d1e87e1e934b1ca44431eea118c28bbfad50374dbcfbbc0df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD25C 14820 bytes
font_03_sfnt_off0001009b.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 16312 bytes

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