Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e7d2a47e4bcaf2…

MALICIOUS

PDF

37.7 KB Created: 2020-08-22 13:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b28480c27a8e3b86bebb33ef77a06e57 SHA-1: d8c02ca73dca75b9b026b7a06a0de4df4eb6fb47 SHA-256: 26e7d2a47e4bcaf29cee99f06c45ba11210f6a7056ab4d9cf812736ebccc83c9
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the string 'adjective noun worksheet pdf' and a URL that appears to be the same as the malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely for phishing or malware delivery.

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=adjective+noun+worksheet+pdf
    • http://kikimegek.raananahikers.com/uploads/1/3/1/4/131407493/loxavudosobud-zebok.pdf
    • http://files.roybedard.com/uploads/1/3/1/3/131380745/27fff54f3.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/neliwuzafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/2068162602.pdf
    • https://cdn.shopify.com/s/files/1/0457/6906/4614/files/kilozowowevuwuxigixop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/87470818301.pdf
    • https://cdn.shopify.com/s/files/1/0434/3978/4103/files/8801546478.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/aditya_hridayam_stotram.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/cadena_de_suministro_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/sample_critical_discourse_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/purixavakenumep.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/dixoketap.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_off000055db.bin
4d55f9b069721a23403196764298bbef625677c146f9439134aa3f783cc32119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DB 5280 bytes
font_01_sfnt_off000067e9.bin
8f4acedfbfb148e132fc7230c00370ba85075e3ce1ebfd54b31dbecde708127f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E9 10060 bytes

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