Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe4ea26f7107845…

MALICIOUS

PDF

36.0 KB Created: 2020-08-31 04:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b000823a0ba72664f49e714e07a1b170 SHA-1: 43c4242fcd305d12574390686ec3e45c331f38ff SHA-256: ffe4ea26f710784576d2d0b06eafda2eccb2e19ed2d23134f1e2956963c7436f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL containing 'amd+radeon+r5+340x+driver'. This suggests a lure to trick users into downloading malicious software. The document body also contains this URL, reinforcing the attack pattern. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely for SEO manipulation or to host further malicious content.

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.ru/wix?keyword=amd+radeon+r5+340x+driver
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/35525058055.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/1055699513.pdf
    • https://cdn.shopify.com/s/files/1/0438/6825/8469/files/official_airline_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/81777531091.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/jibimawapebet.pdf
    • https://static.usrfiles.com/ugd/2c608b_e3c89fbcc7c14921973cf74bea3c9573.pdf
    • https://static.usrfiles.com/ugd/64d889_ab035fd8c3034f5a9fcac6e3adcecc0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_74fc5a1685cb45c594a89ea55cf96e93.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/handwriting_sheets_for_preschoolers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/jepedubitola.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/kuvupud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/39059057877.pdf
    • https://static.usrfiles.com/ugd/b8c837_abdc432b46884b95948ced4d2c913206.pdf
    • https://static.usrfiles.com/ugd/764aaa_11ca9eecb4de431383dacecdd33fd30f.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_off00005039.bin
744fa39908927be3f645dd7dda8f52ff85e19fa2785d008d42b8c42b9d555dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5039 5396 bytes
font_01_sfnt_off0000628b.bin
b10a1b3482148695725daddc42167cae266bd3d8754b8c5e8f3b610a5b7b0896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 9552 bytes

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