Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06d2112bda7a95b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-12 14:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04b5d49ad2c0ebf8d5c4513f66b15027 SHA-1: 5f3bd5f8f7a4cbbb9f63eed394a8abbb0ad8a3a0 SHA-256: e06d2112bda7a95b1a5983bf70bf9f748a425503326d1612c64b2574e02fb123
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'handwriting worksheets' and includes the malicious URL. This suggests a social engineering attempt to direct users to harmful content.

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/wb?keyword=fun%20handwriting%20worksheets%20ks2
    • http://jiwogu.anstrutherlifeboat.org/uploads/1/3/1/1/131164250/tarobivuribimufalosu.pdf
    • http://lefere.spaluxedayspa.com/uploads/1/3/1/4/131406437/mimitok-tapajat.pdf
    • http://vibilako.tysonscorners.net/uploads/1/3/0/8/130815009/nufoliwerefip-pemew-luwekagedirijar-gadagare.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/auditors_independence.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/gimp_2._8_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/36786446310.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/batimafujemivodaduw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/41642765099.pdf
    • https://cdn.shopify.com/s/files/1/0431/7659/1509/files/gupanokoxadaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6124/files/55814929525.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/mizijerulosugoduju.pdf
    • https://cdn.shopify.com/s/files/1/0440/2587/2549/files/55464621612.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/kodopab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/58505191668.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4269/files/15126950724.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_off00006022.bin
12b9eee93c2a5ada6c27601d072e79661875218b7b3172c6b89fc296ee1f369a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 5296 bytes
font_01_sfnt_off00007233.bin
91ea60e77f1512d0198e8fbdd8e6f5483f8de480bd5ec285b4a3a35b9548e7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7233 13372 bytes

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