Malicious PDF — malware analysis report

Static analysis result for SHA-256 d475c3f5f81acbc9…

MALICIOUS

PDF

36.5 KB Created: 2020-09-06 17:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f02e169ae1b7c1bec7d151b2a210471 SHA-1: 0384991c2e9da0396ef3cc2d88c0f6990446c345 SHA-256: d475c3f5f81acbc987be857dda1f5abe3fd19bdc95c2b77eca809d634522c008
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that matches the primary malicious redirector identified by heuristics. This suggests a phishing or scam attempt designed to lead the user to malicious infrastructure.

Heuristics 4

  • 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.
  • 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.club/wix?keyword=preposition+of+place+worksheets+for+grade+5
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/vezug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5505/3989/files/17128044535.pdf
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/kofamofi.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_fc3c1895198c41daaaf1b03c4c7ffc79.pdf
    • https://static.usrfiles.com/ugd/6da380_898c76e49a824f0fa19eca4e6e883853.pdf
    • https://static.usrfiles.com/ugd/2f07a1_fb837270fe4d46d7bc897fd5d904c610.pdf
    • https://static.usrfiles.com/ugd/1e557c_0de98156c12847aeadb203f830edc40d.pdf
    • https://static.usrfiles.com/ugd/185c00_051674e457aa457da3162ad3a1e7ddfa.pdf
    • https://static.usrfiles.com/ugd/4b7290_8d41a76abc874091afde5d932de3f5f7.pdf
    • https://static.usrfiles.com/ugd/b58d21_48fdbe86799a4c3aa0d6b33eab537001.pdf
    • https://static.usrfiles.com/ugd/74a852_66f313ff472b454988855201134e1e03.pdf
    • https://static.usrfiles.com/ugd/966478_7621550dcff0420f9dc17703f7de5a42.pdf
    • https://static.usrfiles.com/ugd/b8c837_1868644f22254e8fa3d860ac5f3c841c.pdf
    • https://static.usrfiles.com/ugd/9421c8_72cee0cf9ba84e36b8f81b57e801f4b3.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_off00004e8e.bin
22cd51329954ec2c6614192e8692e52356598e20d8a593ae7c7ece95f4344773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8E 5696 bytes
font_01_sfnt_off000061fe.bin
cb82904ffdbec129b90184a22971fa2a04e4770825100b7ae5a26bc55398ce9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 10300 bytes

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