Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ad5f77b2e3281a…

MALICIOUS

PDF

37.6 KB Created: 2020-08-21 17:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0156da11c98a126b52bfd51c0b045152 SHA-1: f97d4bf8d0c75b653213194af8783519b15a2ce0 SHA-256: 52ad5f77b2e3281a11392a7fe1a9c75d9826b699c35ec451a9fce513cf2f6c2e
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used to obscure malicious destinations. One of these links points to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the redirector URL and several Shopify-hosted PDF links, suggesting a link farm or redirection scheme.

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.cc/pify?keyword=before+midnight+soundtrack
    • http://dixexe.detroitcbpexplorers.org/uploads/1/3/0/7/130739751/f6145d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.pdf
    • https://cdn.shopify.com/s/files/1/0439/1688/6184/files/18470215186.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69298849274.pdf
    • https://cdn.shopify.com/s/files/1/0451/1848/8741/files/linux_nano_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7059/3955/files/48354558773.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/87624692541.pdf
    • https://cdn.shopify.com/s/files/1/0439/4749/1486/files/old_dryer_sheet_uses.pdf
    • https://cdn.shopify.com/s/files/1/0437/5432/4117/files/12862115778.pdf
    • https://cdn.shopify.com/s/files/1/0437/6913/5262/files/fairyland_3b_activity_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.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_off000045b2.bin
cce4ae1b81c33de1cc626bc36f45fa32b822f66c822ab4a28d25b18f5bbecbeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45B2 5516 bytes
font_01_sfnt_off00005838.bin
11640d5120a5f5fc3873924d769dfc2ee3f63b56e40bacce08f90d41b2c9ebed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5838 5916 bytes
font_02_sfnt_off00006755.bin
590abf4013416ef299f1bbc1983a6f56e406fd4b437a18d5d44239b05ee7fb21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6755 10040 bytes

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