Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74a1b176ee7f666…

MALICIOUS

PDF

39.2 KB Created: 2020-08-11 00:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61efdb0bafdee3ee79d7c9e3cced105f SHA-1: a0f6b49bf8dfa1c82485eb4c0db88891a682a64a SHA-256: c74a1b176ee7f6669d0fab1950b62e39ad6e65569d9ae6e59d6867a7f82e7734
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is embedded within the document body, disguised as a link to a 'design thinking pdf ppt'. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which point to Shopify domains hosting other PDFs. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack.

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/pify?keyword=design+thinking+pdf+ppt
    • http://files.parsonswoodartistry.com/uploads/1/3/2/3/132302941/6690578.pdf
    • http://files.geevesbrewery.co.uk/uploads/1/3/0/7/130776308/loxufakapuziduvan.pdf
    • http://files.cyber-cy.com/uploads/1/3/0/9/130969728/vaseroguxejivem.pdf
    • http://files.corrythepsychic.com/uploads/1/3/1/4/131407227/duwopib_jesesinasarijuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/3879201086.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4340/files/belajar_bahasa_inggris.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/accounting_theory_and_practice_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/pulipibadaxarulejemuxoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4321/7830/files/ccna_security_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/lotowarofimim.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/17478780052.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/82485059395.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/24332676445.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/vofuvofavanifusel.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/76595126281.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_off00005d67.bin
10e66c0adcd1c581b7f06a8a723e61d4c5a1f815af7bf9161a9fc09f9b0c541d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 5028 bytes
font_01_sfnt_off00006e88.bin
caef5c36e3cb4a548e7632a2f88367c18d7e096408b9aa4ea0ae734364512cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E88 10000 bytes

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