Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c47c253146f78e…

MALICIOUS

PDF

37.3 KB Created: 2020-08-29 06:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a7a55c1715ccb49aa5be4545bd36aa1 SHA-1: 3ff78f55d1ff70f27d9f7f1f7bee5ef266fe748a SHA-256: 99c47c253146f78ee1ecc95f907fa7200c1245e5522da2e0ed22f7c0abc92d52
120 Risk Score

Malware Insights

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

The PDF file contains a link that is identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=new+testament+chronological+bible+reading+plan', which is likely intended to lure the user into clicking it. The file also contains a large number of embedded links to static.usrfiles.com, which are identified as a link farm. The primary malicious intent appears to be redirecting the user to a compromised or malicious site.

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.ru/wix?keyword=new+testament+chronological+bible+reading+plan
    • https://static.usrfiles.com/ugd/b8c837_4ffec7ef8bf841e1aef717cf53b69edb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd08ae67a8f149e0b08ce56369bc4199.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8dff59e5c2c43229374fb4de79b666b.pdf
    • https://static.usrfiles.com/ugd/b8c837_56a93c25b40a4abdb5888578d90f060e.pdf
    • https://static.usrfiles.com/ugd/b8c837_71bf78a1578d4de3b45a917ec929f602.pdf
    • https://static.usrfiles.com/ugd/b8c837_31862c9f39b64637ba7bac4ac87c4ad1.pdf
    • https://static.usrfiles.com/ugd/b8c837_de3c9db0f874497da0122ed0da29be62.pdf
    • https://static.usrfiles.com/ugd/b8c837_52b1f7723aae4e51b8b7a0f5db87dec4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa3f79f315344e1b9542d8b04c15f966.pdf
    • https://static.usrfiles.com/ugd/b8c837_12b032929c1c4d90a34db89513d70f04.pdf
    • https://static.usrfiles.com/ugd/b8c837_95bde3f0ece449be9e72462082bb8498.pdf
    • https://static.usrfiles.com/ugd/b8c837_c83f09f74119469e8cda89061375930c.pdf
    • https://static.usrfiles.com/ugd/b8c837_42e5b609ae004ef4ba91df46bbae440d.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_off0000537a.bin
23e17c77ff07a342351a9da31f991ffb720cf71b70a9132962a3a1fb85f44cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x537A 5688 bytes
font_01_sfnt_off000066a8.bin
66ff19aed9a7de82ef14a5bf1efead519d0a926d4fd2b01ac79e94576bf64a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A8 9884 bytes

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