Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bccabd2e24338cd…

MALICIOUS

PDF

46.9 KB Created: 2020-07-30 23:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63451fb3242df2de96b8db029974d0f4 SHA-1: 3100cf700978b7aad14d79c09cd9893958327ff3 SHA-256: 7bccabd2e24338cd7e0985ac2059243a374ef758bb9e8cf2c952631bc86223bb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common tactic for SEO spam and redirecting users to malicious sites. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=aes+cryptography+pdf', which is a known malicious redirector. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document but rather a container for malicious links.

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=aes+cryptography+pdf
    • http://files.eversdalgymnastics.com/uploads/1/3/1/3/131397927/wuwira.pdf
    • http://files.dressingroompoetryjournal.com/uploads/1/3/1/0/131070367/9339704.pdf
    • http://files.positively-mindful.com/uploads/1/3/0/8/130874016/kirukozufugo-sarufobi-pawedetusamaxu-niluwuruporet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/96314991250.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/banaposozibiroxipajiwewaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/9559/4910/files/relamunasuvebimexobuxito.pdf
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/85399109236.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4206/1986/files/nupolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9974/1596/files/56155177420.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99289858455.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/29595553047.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/84511803889.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/rujuporazimobodoge.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_off00006d4e.bin
b09823baffbfd9ad00719541ec8321a390ae460bade8ebd77bb1fb391b826176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4E 5112 bytes
font_01_sfnt_off00007ec7.bin
6791a126d8acf4e6888c5fa5c9a66ce51307c6c41d48aaab345e2eec5dee27ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC7 15172 bytes

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