Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e46f3db21cad25…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 06:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a184dcf302b051f4f5a476fe0422ed5 SHA-1: 0ad6d678aeeaee7534000c10ef3b2ba584979afb SHA-256: 57e46f3db21cad2546738a8726fbbb71dead52995f6205472950ecdc53a2bb9c
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are benign Shopify URLs. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'blue star quality fishing nets'. No scripts were extracted, but the primary malicious activity observed is the redirection to the identified malicious URL.

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=blue+star+quality+fishing+nets
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/69853567703.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/69279305057.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5404/files/devatiwasajenazenewek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/romantic_couple_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/10018496335.pdf
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/vuluwol.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf85d2d082af469d8735312db3fb9416.pdf
    • https://static.usrfiles.com/ugd/74e905_5835e2013ee54db9a99366e70e3b1b8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b16d1d4224f41dd92eab41919879f9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_17db77abc1ae44e0948b522787e92986.pdf
    • https://static.usrfiles.com/ugd/b8c837_4950e941ebea4572b77eaad6d11f2c47.pdf
    • https://static.usrfiles.com/ugd/fedf23_042b61580ec946aea5fd59670a6c4c11.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_off0000656e.bin
0c9424bf833abe6e944d10b82e865ebc8f0169bb23ff4a8bc7c9c5d69e4dab29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656E 5304 bytes
font_01_sfnt_off0000777d.bin
100803f24414a336d497d9ba709b275beaf643ae69b760c24a0a8b93991d83f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777D 10128 bytes

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