Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d61d89509e16d96…

MALICIOUS

PDF

50.8 KB Created: 2020-08-17 17:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af90f9bfee20f573b334530acd02bb99 SHA-1: a9a56d4549171e50debb3421c32486a6d40678b7 SHA-256: 7d61d89509e16d9619032cb6e04d09c3d3fd9179be4b4a551c9c68a4e75a2879
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=balma+film+song+ming'. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=balma+film+song+ming
    • http://gigof.secondchancepetsponsors.org/uploads/1/3/0/8/130873951/divowuzewip_jasefunulosaw.pdf
    • http://files.aj4fitness.net/uploads/1/3/1/4/131453395/sugalemalag.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/zakixoputaguloxebedovod.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/24093794720.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/merom.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/29394597491.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/94331676735.pdf
    • https://cdn.shopify.com/s/files/1/0434/6599/8501/files/business_english_worksheets_printable.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/severepibaduvezojatuga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.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/
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d7b.bin
62f9713becaf6b2653e47a93c6fe43c2d58766d40d5bea770e5d0604b7dae316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 5040 bytes
font_01_sfnt_off00008e9b.bin
d805424b830883f603a8b0b8f5770340879db220261027484c126e5c6301a8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9B 14888 bytes

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