Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d657f7a7efa6e32…

MALICIOUS

PDF

49.5 KB Created: 2020-08-30 06:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e871a0a8554834335776385906d2d4f SHA-1: e5f9708654d7f93908e542a4571be00c34210d7e SHA-256: 3d657f7a7efa6e326242d547d7a2202b1c27e75009c7ba4d6fb16941d3cf0c57
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to attract search engine traffic, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=samsung+smt-h3272+dvr', suggesting a lure related to a Samsung DVR. This indicates the PDF is likely a phishing or malware distribution document.

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.cc/wix?keyword=samsung+smt-h3272+dvr
    • https://static.usrfiles.com/ugd/b8c837_e3438c9ce42e43fda0f973d6262c13d3.pdf
    • https://static.usrfiles.com/ugd/defdb4_34a0fcc9757e4456be37686134a2a639.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc565d8a5fe4862abe0ccba70beb78f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dae6cf70624488d80d3fba796d71520.pdf
    • https://static.usrfiles.com/ugd/a58b01_e65a7bd6d12c4e34b62d680eb4df3c62.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ef5f41e33b640cd86d189a6b74edc3e.pdf
    • https://static.usrfiles.com/ugd/eaf48f_bf445051aa824c6bbff93eb2e5fbe662.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a7ab4fa13ef4a3381c92a1aa9ddd512.pdf
    • https://cdn.shopify.com/s/files/1/0435/2324/4191/files/dolafirisuliburewiwapijam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/bojekozupegurixamimiwuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/42687073866.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/buzitudedeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/boges.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/95926017630.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6471/files/weather_and_climate_lab_manual_answers.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_off000081a1.bin
2cd772dc5ff5b57cdf7fa4906a7b115455fd64b7675ddb4425d446062f55bd7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A1 5780 bytes
font_01_sfnt_off0000952d.bin
a123bb97fe76fde4e1c90095893a8e9aa3820989f3a7f4c1ea9fb550ea82a4b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x952D 10556 bytes

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