Malicious PDF — malware analysis report

Static analysis result for SHA-256 852ecfdb2d7dc09e…

MALICIOUS

PDF

42.9 KB Created: 2020-08-09 12:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6cf9476840cb157b7e4014ae0abdfee SHA-1: 645ee677a39c1e634c7bda67b18029df85d6293d SHA-256: 852ecfdb2d7dc09eb123d38d5ca33437636c109daa81414f85ab9e1f96c76e37
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the text "Scentsy catalog fall 2020 pdf" and the malicious URL, suggesting a lure to trick users into clicking on malicious links. The ML classifier also strongly flagged this PDF as malicious.

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=scentsy+catalog+fall+2020+pdf
    • http://files.design-art-trends.com/uploads/1/3/1/4/131453062/dd077.pdf
    • http://xumemenuf.gospelhillministry.org/uploads/1/3/1/3/131383314/3994f816.pdf
    • http://tafage.hawaiijoessurfboards.com/uploads/1/3/2/7/132712358/zikedogoguvumu.pdf
    • https://cdn.shopify.com/s/files/1/0444/7030/4935/files/delete_folder_on_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4404/files/61654357245.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/39713004720.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1703/files/rudram_chamakam_lyrics_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/57165281744.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/a_clockwork_orange.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/54853871432.pdf
    • https://cdn.shopify.com/s/files/1/0439/0286/1464/files/dizirisedufenewenimixas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6909/files/28810178909.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/mubokototaz.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_off00004e4e.bin
28594faab2bc636a78405afd390a767b55621600a26bfecc311ba658a95237b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4E 5448 bytes
font_01_sfnt_off000060e0.bin
2b2e9f95e534ffa420309209ec5cc931d076a4d6fd3e6a907ccfe4ce10e2a1c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 14976 bytes
font_02_sfnt_off00008ea4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 4324 bytes

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