Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c0d5577ff3c9d7…

MALICIOUS

PDF

42.2 KB Created: 2020-08-16 17:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dd949aedfe6f829d4c3625b56d843be SHA-1: 8843e5699195f6d32ea890ab570e7f3655ab843a SHA-256: 98c0d5577ff3c9d798f274b3d20c5a686eb2ea4a091547b9d6b7c4f275d41077
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 'https://ttraff.cc/pify?keyword=cara+backup+data+android+lewat+gmail'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to various Shopify-hosted PDFs, likely intended to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the PDF's purpose is to trick users into visiting this URL, likely for further exploitation or phishing.

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=cara+backup+data+android+lewat+gmail
    • http://files.lindseyraisa.com/uploads/1/3/1/0/131070618/5609313.pdf
    • https://cdn.shopify.com/s/files/1/0439/0685/9163/files/ikea_catalogue_2020_dubai.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/47267688932.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/21746933702.pdf
    • https://cdn.shopify.com/s/files/1/0447/8782/6854/files/joxukebasidogovekobig.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/88888863248.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/paxarozofuvaradugagip.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/asuhan_keperawatan_endometriosis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/57064970392.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_off000066f9.bin
54203fea459a825519eb8ab1157f929c563b99b43e2cb0ec6b9061d674256aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F9 5416 bytes
font_01_sfnt_off00007963.bin
d04a4311bd1d88dbc14d203b433f1720ae18dd4ca9217e1607a74164f071fe41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7963 10196 bytes

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