Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7eb710fe15bc55…

MALICIOUS

PDF

38.6 KB Created: 2020-08-21 10:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6bdc0f6cfa7a78a5da40084cac2d2c9 SHA-1: a5e81dab67e5e943bea57f0386f8365578148a7c SHA-256: 9f7eb710fe15bc5511dc82b293baba2668b9aecd3085e42e932fa13928de851f
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This indicates a link farm or SEO poisoning attack designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are sufficient to determine the attack pattern.

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.com/pify?keyword=aromatherapy+books+pdf+free
    • http://somala.mndnorthwiltshire.org.uk/uploads/1/3/2/3/132303189/a342b34e4a051d.pdf
    • http://files.alcdance.com/uploads/1/3/2/7/132740260/c38e38ffac783fe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/neurofibromatosis_tipo_1_genetica.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/17970966175.pdf
    • https://cdn.shopify.com/s/files/1/0432/1594/5890/files/old_norse_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2106/5640/files/rezofu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/asterix_french.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/xivamerenebuzep.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4940/files/46994506989.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/50851747359.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/megufifugoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/90825508541.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/resume_cover_letter_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/73011153529.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/revipobamaseb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ae6.bin
9284c16acf8f8dfc540c8511c3e5a7740d7fd5af770bdec923ff4989ccbebe41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE6 5176 bytes
font_01_sfnt_off00005c74.bin
6fadee95a7b3bd29aa004091cc9b8edd67b91bb6143bc939c5d0e191e2c25c5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C74 10272 bytes
font_02_sfnt_off00007f8b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8B 4324 bytes

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