Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61060bb0ccc9281…

MALICIOUS

PDF

49.2 KB Created: 2020-08-31 13:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc9ff4a1406ba1c293bf0a02d9f9af69 SHA-1: 22fda61aad2ab8764eb26bb12a126e0b32dbce3b SHA-256: f61060bb0ccc928126d60ab6bda8d61ef958cd9d10d508eff413fd1992ea7b88
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free download for 'gloomspite gitz battletome'. This link, https://ttraff.me/wix?keyword=gloomspite+gitz+battletome+free+down, is designed to lead users to further malicious content. The PDF also hosts a large number of external links, many pointing to static.usrfiles.com, which is identified as a link farm. 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.me/wix?keyword=gloomspite+gitz+battletome+free+down
    • https://static.usrfiles.com/ugd/685707_f4da9db71e0b4b56a09ea59d12b77ebf.pdf
    • https://static.usrfiles.com/ugd/b8c837_7295b7dca1ec4c1ea5e646ec88bd6e5a.pdf
    • https://static.usrfiles.com/ugd/db93e9_7439ec6e3fa843118e62289d3e5f8f90.pdf
    • https://static.usrfiles.com/ugd/105a8c_8fc1a007ec724f519c9858ffe1348b91.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/5723346205.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/87072039903.pdf
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/92775855801.pdf
    • https://static.usrfiles.com/ugd/23b571_fa92e0995663460a9722993485e4912b.pdf
    • https://static.usrfiles.com/ugd/a18aa6_5bb37f1bb3fd487b9cbb9dbeb2eb1293.pdf
    • https://static.usrfiles.com/ugd/ac72e0_ff020b0aff644ad58057d01a193f5ffc.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_8b244bd99afa4aebbbf4d5f8189faa23.pdf
    • https://static.usrfiles.com/ugd/b8c837_e849912209f04ee8b3916722d17836b9.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/dujijazikirogesulesan.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/wisigexulumalule.pdf
    • https://cdn.shopify.com/s/files/1/0438/6933/9808/files/ronolabapewobijener.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_off000081f5.bin
8bec02b690b986e5c275b59bd2e82a4e0ef6491027bd2a91a0a4c8684518f0d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F5 5676 bytes
font_01_sfnt_off00009548.bin
e32219ab800f67ca23d386cf0d8020a827ee1950052a15c8ef3c83e47d5e9251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9548 10060 bytes

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