Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca929c10f0ff07be…

MALICIOUS

PDF

59.8 KB Created: 2020-08-31 06:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd93135484cb78eff7ee74e48d0b9679 SHA-1: 8592f25288386b9c08244b93ec945c00d5ffa99d SHA-256: ca929c10f0ff07be4d85a3823559795badae565389f407edae6dcdd2a265d3aa
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used for SEO spam or to redirect users to malicious websites. The primary malicious URL identified is ttraff.com, which is flagged as a redirector. The document body, though heavily obfuscated, contains text related to academic writing and includes the malicious URL, suggesting a lure to disguise the malicious intent. No scripts were extracted, limiting the analysis to the link structure and document 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.com/wix?keyword=how+to+write+anything+with+readings+with+2016+mla+update+3rd+edition
    • https://static.usrfiles.com/ugd/b8c837_ce64934b18b9454eb1cd4b0ec1c38508.pdf
    • https://static.usrfiles.com/ugd/4dd980_0fae4cc257a64c6d89446dfd7f8e9964.pdf
    • https://static.usrfiles.com/ugd/510a18_24a4d16d8ddc4540a58f0daa287ecb70.pdf
    • https://static.usrfiles.com/ugd/b8c837_97ae035b272045479be49a6e15ce87e1.pdf
    • https://static.usrfiles.com/ugd/9b5f63_6e1e8030466448d6add5c21775157812.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/ratavapaguwijuneb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1158/files/fuser.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/57403394871.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/24453094422.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/73248682415.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/wofumosazuzofeg.pdf
    • https://static.usrfiles.com/ugd/576447_7912ec72c8c644cf88dd7aab7a219677.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d3364034134d359eb31f41ffd4f906.pdf
    • https://static.usrfiles.com/ugd/e3834b_a2d568a6c397438280d553ec37921160.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_off0000a17a.bin
b49b0101e748583acb85ac9f0189856c56cfaf1365e3e634c92f0a0bbd8d7046		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA17A 6172 bytes
font_01_sfnt_off0000b65d.bin
af1ba24b971cfaba35e91f570afdfeae5eed4f430a0a234958728ef69f94bfb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB65D 13668 bytes

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