Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3d3d717f487d25…

MALICIOUS

PDF

38.1 KB Created: 2020-08-02 21:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fd82e4ef0b342b4bc1c109c76ddce22 SHA-1: c16691924213a57fa24eb803c9f2bc9bd3da5ef9 SHA-256: 8f3d3d717f487d2540eea40aaeccbbc7c359e3d210666e8e419213eb1d668936
120 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Genesis bible study workbook pdf'. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The primary malicious IOC is the redirector URL.

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=genesis+bible+study+workbook+pdf
    • http://files.sacrp.org/uploads/1/3/1/8/131871864/tetowijobafo-nofizuze-laluluminit.pdf
    • http://files.smartbrainenglish.com/uploads/1/3/2/7/132740805/nokedelegixo-kididine.pdf
    • http://files.sandbfoundation.org/uploads/1/3/1/4/131452735/darojaxukaxuvomi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/tamulumasud.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/kalipazarewenenokofunub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/78744377978.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/dediwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6615/files/namecheap_github_pages.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/53720442502.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/radogux.pdf
    • https://cdn.shopify.com/s/files/1/0432/9842/2934/files/muwawofefaruja.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/pofajivinabewane.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4790/files/99164088923.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/tiberebawokekomexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/79614627182.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/30989919894.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_off000058b3.bin
5bbf477f3998aa447f39a43dd182d9b427a09f0563d7f704d639271d38c8864a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B3 5256 bytes
font_01_sfnt_off00006ab7.bin
60f927260dc4ae6ba25096913bc09aa4d099eb868bb0125a94442ab52e06940a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB7 9400 bytes

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