Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aab7001fa7345e2…

MALICIOUS

PDF

50.9 KB Created: 2020-08-01 12:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0732d233ff47c0950928ba812960583 SHA-1: 6a983ab9ade677112ea91fe7b66c143bffa707ab SHA-256: 9aab7001fa7345e2c44bf9b0c869297ad37c9e14e138fa723c53e1bbcdae1575
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL `https://ttraff.cc/pify?keyword=leetcode+meeting+rooms` is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links hosted on `cdn.shopify.com` and other domains, suggesting a coordinated effort to distribute malicious content through a link farm. No scripts were extracted from this sample.

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.cc/pify?keyword=leetcode+meeting+rooms
    • http://files.pnagkc.org/uploads/1/3/0/8/130874566/pemulewebikijab.pdf
    • http://files.popponessetbeachassociation.com/uploads/1/3/2/6/132695472/84b8e1559efa2.pdf
    • http://files.amayapryce.com/uploads/1/3/1/8/131872055/nulavu-nebidifuvipe.pdf
    • http://files.askyourdata.co/uploads/1/3/1/6/131606968/5c7d4d.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/86042760545.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7618/files/55374322638.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/68934944163.pdf
    • https://cdn.shopify.com/s/files/1/0434/6439/2866/files/januminularuwufetixivu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/gukakunewexoxikadixobejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/56895034457.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39748763391.pdf
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/39971993519.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/netopusedofefolav.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/nsa_css_policy_manual_3_16.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eca.bin
b3d0a28e85d311676d835000ca61ba07140d4481eecc7fa0e315a5f67465b363		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECA 4748 bytes
font_01_sfnt_off00007ed0.bin
738d9ea6bc8700f1c385a7a508f3e866849c8765dfca6361ee74f94b5267da5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED0 15236 bytes
font_02_sfnt_off0000aea9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA9 4324 bytes

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