Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6317c6723a63ae…

MALICIOUS

PDF

37.7 KB Created: 2020-07-26 08:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97d57fdcfb3bd23d588d6bd71d075acd SHA-1: 4ff5267a7ff403c65ab05f089a98de578ade8e94 SHA-256: 8e6317c6723a63aec4a859b2afa3d18481b3fe346a471a99cc903c7f33789fdb
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a children's story. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary goal is to drive traffic to malicious sites. No scripts were extracted, limiting the analysis of direct payload 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.cc/pify?keyword=worksheet+on+hansel+and+gretel
    • http://files.statesocietyofflorida.org/uploads/1/3/0/7/130739993/vugigitozixuzex-padar-venaxamebe-kibatoz.pdf
    • http://files.akpartnership.org/uploads/1/3/2/6/132682063/d470a952d1fa.pdf
    • http://files.nantucketislandfair.com/uploads/1/3/2/7/132710732/9821218.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/zifumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/81362287021.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/noroxixejofozofig.pdf
    • https://cdn.shopify.com/s/files/1/0431/0948/2658/files/guzef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/22539329221.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/77048427693.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/difuvifitatadujoxofubeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/73816703952.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/32883167301.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/tibonuxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/batetoful.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/2470078778.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/89458469980.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/1/0429/6340/2905/files/22

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056c4.bin
48aa301b15000e19d9ba2800f9b2fe1b3d03dc0d2a3da6000e4d3bddb36d0e42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C4 4904 bytes
font_01_sfnt_off00006774.bin
885ce1a04c1ae4062b57e53b7dbd2c2e69fbfbd3026d8755af35837a6ad11448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6774 10124 bytes

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