Malicious PDF — malware analysis report

Static analysis result for SHA-256 a107b33a60caba93…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 22:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 779310b367a2441e7f0d2daff3093c2f SHA-1: 617909854275162f80986aff1c69a3478f407df5 SHA-256: a107b33a60caba93a86f1e4c36ca65d78ab881194d7f3b06c2c368344f48d2ef
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=gift+voucher+template+nz'. The document body also contains text suggesting it is a 'Gift voucher template nz', which is likely a lure. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm or redirection strategy to obscure the final malicious destination. The primary malicious IOC is the redirector URL.

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.link/wix?keyword=gift+voucher+template+nz
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/84099058045.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/hypoxic_ischemic_encephalopathy.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/chrome_plugins_chromium_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/37392468753.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/wixaloro.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/58220496021.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/sample_ballot_for_barangay_election_2018_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/fexerisafaxok.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/66252872950.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/bilinear_transformation.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5687/files/28840184873.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_off000068f3.bin
e8f69e613c2b48a82fca29beab7c73370d088ee0eadf066036d06365f1e3f26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F3 5220 bytes
font_01_sfnt_off00007aa1.bin
dd2904bc2035a0a3393fdf594928f62494e9bdb0da790584466f04f0b37fd94c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 10248 bytes

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