Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5a1bd870023cdb…

MALICIOUS

PDF

81.2 KB Created: 2020-09-01 01:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e3cae7ec22e31f3d42cb2f2027921cc SHA-1: fd382ed51733c3264643499d154187a90d51dc9a SHA-256: 8f5a1bd870023cdb74967c501d3ec5c04d42607d4b8adf0a4ef8ad7e56dcd217
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1059.001 PowerShell T1059.003 Windows Command Shell

The PDF contains a malicious redirector link to 'ttraff.com', which is flagged as malicious. Additionally, the document includes a lure to copy/paste content into a command-line interface, suggesting an attempt to trick the user into executing commands. The presence of numerous external links, many pointing to 'static.usrfiles.com', indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final destination. No scripts were extracted, but the combination of a malicious redirector and a command execution lure points to a phishing or malware delivery attempt.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cakephp+complete+tutorial+pdf
    • https://static.usrfiles.com/ugd/b8c837_854ccda3cc304d0586db2b2da9a270c3.pdf
    • https://static.usrfiles.com/ugd/3bcfef_486c40566b174a2f8857bb4f00ad12e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b50bcbcf018438aa93353c7cc087134.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.pdf
    • https://static.usrfiles.com/ugd/b8c837_7153104b2f4e4ed4bfcd29b37267f57e.pdf
    • https://static.usrfiles.com/ugd/51c472_090d9de225bf4f0f922286a4653bb536.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e43aeba9e79492dbf2cae5d68a824a9.pdf
    • https://static.usrfiles.com/ugd/234f58_52451dac78e54eb4a92c075df10905e7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/tepituzevofademuladi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/draconian_ritual_book_asenath_mason.pdf
    • https://static.usrfiles.com/ugd/b8c837_31facdb28ae3470c841cfb5e3d84d451.pdf
    • https://static.usrfiles.com/ugd/b8c837_3516c67845fd40e2adecda447aa46ce6.pdf
    • https://static.usrfiles.com/ugd/04c368_4614317699024b23ae54e0da8e104f8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a910ebb2b4f94c85bd93113981655c12.pdf
    • https://static.usrfiles.com/ugd/8cbfce_5908b8c41a4749378ffb78ec640ebda5.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_off0000e6ce.bin
30d4c15c019ad9c678c3b62646e5e592d0cc8552e3937794d2e9bbc224e111de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 5080 bytes
font_01_sfnt_off0000f81c.bin
894cf59ad62279a9002e772d4af5bf689ab91e6cde2d89d54c47dcbf24e5e72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 15144 bytes
font_02_sfnt_off000127d4.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127D4 4324 bytes

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