Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfd2b3435eea872…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 18:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df56feaa2e0e9be00423904f38fbf381 SHA-1: d2e7801aadff0523c3d76a34497694ccc72e0161 SHA-256: dbfd2b3435eea872f9d42e064d90b711f2317f703822d94971076016a9a51f40
130 Risk Score

Malware Insights

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

The PDF file contains embedded links that lead to a redirector service, which is a common tactic for delivering malicious payloads. The document body text, though heavily obfuscated, suggests a lure related to an 'Excel bookkeeping spreadsheet'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking and distribute malicious content. The primary malicious URL identified is ttraff.cc, which is known for redirecting to harmful sites.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=excel+bookkeeping+spreadsheet
    • http://bukujuwa.ensophysicaltheatre.com/uploads/1/3/2/7/132741508/6710777.pdf
    • https://cdn.shopify.com/s/files/1/0450/7772/5347/files/bloqueo_av_grado_3.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/18746309546.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/54724301390.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/1358188799.pdf
    • https://cdn.shopify.com/s/files/1/0450/2913/0404/files/dejuvosuwefi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/1243688324.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/85216454343.pdf
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/1849766932.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/fodabokusonup.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/61252091601.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/yajur_veda_upakarma_telugu.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_off00006525.bin
79278e99a4d872d028411d2263d207b44eb1f3ab85751fbcab20f54fa5b7df1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6525 5564 bytes
font_01_sfnt_off00007802.bin
b5e8cf1a68afb3d73ae7a98b9b7ff896306d5abc63075560032c2d153b989022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7802 10044 bytes

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