Malicious PDF — malware analysis report

Static analysis result for SHA-256 476704b5db823cbb…

MALICIOUS

PDF

48.4 KB Created: 2020-08-22 09:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8223e60d8e4246c0fa2337e2cd34d11 SHA-1: 3524d25d5b99db02ad1f9fca79857038b16050cf SHA-256: 476704b5db823cbbe78f889d3ac113de1c667080c9e3943e392b6fa047ab4a0c
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, indicating an attempt to lure the user to this malicious site. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious payload.

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.com/pify?keyword=region+8+eastern+visayas+pdf
    • http://files.mickeytheis.com/uploads/1/3/1/3/131383467/zovitosovusizogebe.pdf
    • http://files.holmescreekbc.com/uploads/1/3/0/7/130740262/vinotaboseta.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/79819650594.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/bajitekogil.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3765/files/34794760581.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/fetuwofedogojolus.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/aix_command_reference.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/29383583098.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/best_cinematography_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/linobojufenubusageral.pdf
    • https://cdn.shopify.com/s/files/1/0431/8763/4338/files/37043091674.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_off00007406.bin
a7658cec7b2ce8c3e29c2389ece1dd40a7d49b2a72ebc7b31d34ddc00b0f601c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7406 5540 bytes
font_01_sfnt_off000086ff.bin
54069fc1e6286945c7701dfb3c3676b21a7dcfef6adf1a36ad967136751b7a79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FF 14904 bytes

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