Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7934683580956c5…

MALICIOUS

PDF

47.0 KB Created: 2020-08-24 05:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd8ef00baab72bc84baa8be4877b5522 SHA-1: 7fc69c6b4ba51b3b2d70baea338f61d0d8214dd9 SHA-256: d7934683580956c5041a0ca22f8d07577c139d6787b6cf3cce2d34e28714e2a1
130 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Hepatology journal case report' and the malicious redirector URL, suggesting a lure to a malicious site. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content or to distribute further payloads.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=hepatology+journal+case+report
    • http://files.senoritaharris.com/uploads/1/3/2/8/132816096/1774002.pdf
    • http://wazigo.tmeansphotography.com/uploads/1/3/0/7/130739629/c07144a7f79d.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/black_seed_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/netimijubisoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/xoxez.pdf
    • https://cdn.shopify.com/s/files/1/0429/4803/4716/files/10404009964.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/30085287377.pdf
    • https://cdn.shopify.com/s/files/1/0430/7212/7125/files/95655638790.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/augmented_reality_applications_in_design_and_manufacturing.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_off0000779b.bin
54378d57f19fa7ed2aa9257bbd67002139d4ae9c79e4d61ca649dd7b7d145620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 5240 bytes
font_01_sfnt_off0000898a.bin
c2c59e078c0979f6c140a7c0efb233c741b068236b58bcfab67f00edd82e7dd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898A 11284 bytes

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