Malicious PDF — malware analysis report

Static analysis result for SHA-256 967d7cbdd294eba1…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 05:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab88d8d1aea52db8a8e153b0255141cf SHA-1: e7e160fe7f96ecd9369e4d101c188ea03625cee7 SHA-256: 967d7cbdd294eba1783bffd3e44bd23f537abd20355bb63857b3f41393bc566e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to "Fate grand order saint quartz generator" and embeds multiple external links. One of these links, https://ttraff.cc/wix?keyword=fate+grand+order+saint+quartz+generator, is identified as a malicious redirector. The PDF also features a link farm, with many links pointing to static.usrfiles.com, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/wix?keyword=fate+grand+order+saint+quartz+generator
    • https://static.usrfiles.com/ugd/10e3af_f6e62e52029c463daa57f50b4c676121.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4a94a6ddf6d452cbc41c039b8f8e669.pdf
    • https://static.usrfiles.com/ugd/40b9e6_17fc7e5c546841aaadbdafd41b570587.pdf
    • https://static.usrfiles.com/ugd/b8c837_adf2ac53552b41a4b979e46e9bfcefbb.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/11197168386.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/99430105835.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/86550825553.pdf
    • https://static.usrfiles.com/ugd/b8c837_0480742dd71943639538b7cb4bedafa8.pdf
    • https://static.usrfiles.com/ugd/12745a_1ab039429fea4c29864b2109d1290712.pdf
    • https://static.usrfiles.com/ugd/34ec99_70e111f0585b41679893f50857931939.pdf
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/5319600939.pdf
    • https://cdn.shopify.com/s/files/1/0435/5260/4328/files/github_pull_request_template_title.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059a0.bin
849843732017bde63c7396a7b004f4d084aec073427aff1802be77b22fd0fcad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A0 4976 bytes
font_01_sfnt_off00006a90.bin
74c5a87ad7aca31bab26dfe1ea8c43a41e7ad4567b59afd9d145b89630071202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A90 10880 bytes
font_02_sfnt_off00008ec9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC9 4324 bytes

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