Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97ad7a523e2546a…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 01:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97a646e9de245caff8e6ba9aaaf63e56 SHA-1: bdd70432220702d862e4ae3aafe75d4468805320 SHA-256: a97ad7a523e2546acd48be5436c5e66e39e719d5a967caa7c00fafb6347edb2c
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Adwords google Werbung' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute the malicious payload. No scripts were extracted from this sample.

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/wix?keyword=adwords+google+Werbung
    • https://static.usrfiles.com/ugd/9cfd0a_11a1388841fb4f2fa25891ddbf820976.pdf
    • https://static.usrfiles.com/ugd/ade4e6_b9e17ffb35bd4a82a2e32ae58f652461.pdf
    • https://static.usrfiles.com/ugd/a382ee_fdbdf74490b24aa485521856956470f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_323fc7260c8e4fbf8ba06a48e7f2aac7.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62dca9eb4164cc580e4e8856dd25dcd.pdf
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/mababiwevejidiwowuwalaxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0429/4901/7756/files/kefaxo.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4d156699cb4103ae10e8fb5e5bc39a.pdf
    • https://static.usrfiles.com/ugd/b42fd6_283eee7843c94d998aa6b1a88addaec9.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/economics_agriculture_multiple_choice_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/89690446069.pdf
    • https://cdn.shopify.com/s/files/1/0438/2805/2130/files/96912126318.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_off000061c8.bin
a1d3e4ea8679bc1f7e37295736a060624fd5b23af7e8a32008ad82f99e256138		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 5112 bytes
font_01_sfnt_off00007356.bin
39a4bbe5de2681750680497239d86330863f08a11c0a8511e5ca451eb3fe51eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7356 10400 bytes

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