Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8acf099dd997c4…

MALICIOUS

PDF

52.7 KB Created: 2020-08-30 22:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b057920049f1da578615c9327859e24 SHA-1: ae2098ddbebe8b0b4b0bdbdde17893215638ff7a SHA-256: 6e8acf099dd997c40873c1cf7330b365ae14b5e38bc51467230a0e3099c71292
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to external resources, a technique often used for SEO manipulation or to distribute malicious content. One prominent URL, 'https://ttraff.cc/wix?keyword=watch+rainbow+rocks+online+free', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to this malicious URL and other links, suggesting an attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=watch+rainbow+rocks+online+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/7770155225.pdf
    • https://cdn.shopify.com/s/files/1/0437/6166/4154/files/dolce_gusto_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/wexelanoji.pdf
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/comparing_mixed_fractions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/5_30_utc.pdf
    • https://static.usrfiles.com/ugd/dc98cc_a90451fe077a4c0a84f97227bfc778ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_f035972904dc4f688e7143e1609cbd03.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf72fc765e04470a8f2e65bb3ff3554b.pdf
    • https://static.usrfiles.com/ugd/80bfa9_9edc11da9a844b06ae3a7b36fd20f71c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6dc46405b074502859cef609ce0d915.pdf
    • https://static.usrfiles.com/ugd/b8c837_edbf9d3e982a4cc5be79995981a2a573.pdf
    • https://static.usrfiles.com/ugd/3aca14_8d4ebf4362a34464bdd136147a135c7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c74f14b5ba3450f8223cac2d058149f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9606e8de32fc4678b6a6a434a3988853.pdf
    • https://static.usrfiles.com/ugd/b8c837_1796ddaa77c143c68fd607b0def975dc.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000679f.bin
69dfc0f18a50f1bdfc4a587f3e5e7d355d4e8f7a22d3ca39fe218dd6e5e4af4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679F 5068 bytes
font_01_sfnt_off000078dc.bin
89f8fb158f6cbe27e178eb4373aff9d9f2ed90d4261a187bfe05e4011d2241a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 10420 bytes
font_02_sfnt_off00009cb7.bin
9bb10d83f7fc04780445ff594c84378026daecedb7806248e34a32adbdaf2e6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB7 17588 bytes
font_03_sfnt_off0000b71b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB71B 4324 bytes

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