Malicious PDF — malware analysis report

Static analysis result for SHA-256 7790fc6c3287c1ef…

MALICIOUS

PDF

42.4 KB Created: 2020-08-02 18:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36b3e47c5e33d13928a7b6a6fd82c6b1 SHA-1: 82290892fd6bc229963d63d6ebfb1fba254a0532 SHA-256: 7790fc6c3287c1ef8534333931e129059fdc167e9822dac88f55d83449a2dd23
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=binary+search+worst+case'. It also exhibits characteristics of a link farm, with numerous embedded links to PDFs hosted on cdn.shopify.com. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick the user into clicking the malicious link, likely for phishing or malware delivery.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=binary+search+worst+case
    • http://files.wcpreschoolva.com/uploads/1/3/1/0/131070351/dutaxobizidifi.pdf
    • http://files.alyssacoughenour.com/uploads/1/3/1/3/131378899/6613376.pdf
    • http://files.littlesharkandco.com/uploads/1/3/0/9/130969185/561f17d4005e0.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/85031800192.pdf
    • https://cdn.shopify.com/s/files/1/0438/2117/0850/files/29534251023.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/11588411861.pdf
    • https://cdn.shopify.com/s/files/1/0428/3986/7559/files/natazezenumufujedapez.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/5976612300.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/85110751120.pdf
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/emblems_for_bf4.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/9945727054.pdf
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/9537497044.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/46456462828.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/saxujo.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_off000067f2.bin
d3702d62c26f93957a6e7b09f2dacf5b3b64ff470194d7b954ce37ac37448b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F2 5096 bytes
font_01_sfnt_off0000795c.bin
a3a0870b20f4575ece1da0e694ebd25b457062c775c9cecfee8b207ca2a1baea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 10488 bytes

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