Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47f3e0c2007685a…

MALICIOUS

PDF

56.0 KB Created: 2020-08-18 12:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d3df8c1f2f9eb8629ce04f689714d61 SHA-1: 6898775fd2810fab7bd1f99249ebd3f03945c838 SHA-256: d47f3e0c2007685a8e51291fdc3f4fb35c63b50be996531086813d7f9db20eb1
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=ada+statin+guidelines+2019', suggesting a lure to a malicious site. The presence of numerous PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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=ada+statin+guidelines+2019
    • http://files.sybilsyarnshop.com/uploads/1/3/1/6/131606617/pepiba.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/gedager.pdf
    • https://cdn.shopify.com/s/files/1/0439/4768/8091/files/kcse_chemistry_form_2_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/75296977130.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/lemowoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/lajokikiruwomomezim.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/pilokovarixawokasolo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/5261327219.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/chaupai_sahib_path.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/73400491087.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_off000094bc.bin
aaa6f8e8d44f4eea4f3a0afefbcdd1b728864373fef8418960bca99fcd1f6acd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94BC 5368 bytes
font_01_sfnt_off0000a712.bin
85ea6e22b6817813a351515ff03a961bf6dfe399b54622c3dfb28267a1740e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA712 14220 bytes

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