Malicious PDF — malware analysis report

Static analysis result for SHA-256 2752dbb891554935…

MALICIOUS

PDF

35.0 KB Created: 2020-08-24 00:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c7aec6b4c1f53ee4a6900cc33976c6b SHA-1: 61d420be35df308e0a67236972dac6d548ec4047 SHA-256: 2752dbb8915549356a3f6d44b7c81dec3d1a2aa5d7288bc49067890449a373be
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=trumpet+sheet+music+avengers, is presented as a lure for sheet music. The document body, though heavily obfuscated, also contains this URL and other links pointing to PDF files hosted on Shopify, suggesting a link farm or distribution mechanism. The presence of a malicious redirector strongly indicates an attempt to lure the user to a harmful destination.

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=trumpet+sheet+music+avengers
    • http://files.shioyacountryclub.com/uploads/1/3/1/4/131409909/fetitafotawos.pdf
    • http://files.brianbaginski.com/uploads/1/3/2/7/132712000/4245913.pdf
    • http://bukuruw.desotoyou.com/uploads/1/3/2/6/132681337/ca21c6.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/rutanoxijojelupepaves.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/inventory_sales_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/lepus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/47807357236.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/hindu_baby_names_for_girls.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/maria_sue_chapman.pdf
    • https://cdn.shopify.com/s/files/1/0462/4505/2570/files/vcds_fr_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3644/files/96270395777.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/13986241452.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/33264347938.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/tosevufi.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_off00004c04.bin
f1b0fb6d957d11752e2ea9c44ecebdc18ed6e0f2d664aba66d64ee61ef71fb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C04 5324 bytes
font_01_sfnt_off00005e03.bin
91561d76f5021eec34bca8c857a77fa56f7d551352489a39827ff770469ba00f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E03 9792 bytes

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