Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ada734cc56fe43…

MALICIOUS

PDF

41.3 KB Created: 2020-08-07 01:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000ac1a1ae68ac0c1c247d9d982ee9dc SHA-1: 43fb13a4b1b6470148e09a5f75d8df1134f3d1fb SHA-256: c4ada734cc56fe43f8065192f9b0149bc4bec8120479a83acb27959701038f08
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=barriers+to+effective+communication+essay+pdf', which is a known malicious redirector. This suggests the document is designed to trick users into visiting malicious sites under the guise of providing a PDF document.

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/pify?keyword=barriers+to+effective+communication+essay+pdf
    • http://files.nspdkincbetalambda.org/uploads/1/3/0/8/130874213/mivulamuwop.pdf
    • http://files.staysweetnicolas.com/uploads/1/3/2/8/132815318/fumewaduribo.pdf
    • http://totezoto.doodledesignsandrhymes.com/uploads/1/3/0/7/130738799/d58ae04ea.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/43670734199.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/kilixemetemebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/adobe_acrobat_editor_free_download_full_version_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/44884484388.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/79029808756.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/49081504084.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/90206073903.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/79677438392.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/raladib.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/57937491206.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/86500770990.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/vebumalofuwetutunekuz.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_off00006403.bin
134fd6813b4abfffc22fc9e0e3c103867cab5d0bbffd63f1dc4aba6602f29104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 5480 bytes
font_01_sfnt_off000076a4.bin
ad5af535e30e32bef63f6e94880eb2dc7ca1cd44a1065239585e8d6c37dfaf9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A4 9892 bytes

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