Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3672abba88e8f9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 15:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3a91cfea5ff5c43d1d86b6283cc1dca SHA-1: 6cf85e2ad4bba2213d639775a0d2aad1e8d6d4ab SHA-256: 9a3672abba88e8f9a6a69e03b67676ebade9e1640219d92e0bbed3387b6731f1
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=brasserie+video+song, which is a known redirector. The document body contains garbled text but also includes the same malicious URL and several benign-looking Shopify URLs, indicating a potential lure or redirection mechanism.

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=brasserie+video+song
    • http://files.carolynhart.com/uploads/1/3/1/4/131407364/22e30e.pdf
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdf
    • http://tajinegek.renataclo.com/uploads/1/3/0/8/130814328/9929613.pdf
    • http://files.archivesmedia.net/uploads/1/3/1/4/131437242/lovigereger-bovimiwon.pdf
    • https://cdn.shopify.com/s/files/1/0451/8608/9109/files/all_call_recorder_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/w_2_forms_for_quickbooks.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/bracketing_in_phenomenology.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/kinubemijek.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/76773285336.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/zozorem.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/36451934178.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/daoc_phoenix_albion_lvl_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/pufopikasimewezimigej.pdf
    • https://cdn.shopify.com/s/files/1/0433/5265/3973/files/mukokufobiredujone.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_off00006f76.bin
ac226f534497b7a4801f416b49d4126cae4616de85149cd8dd836a8b97ecf9b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F76 5072 bytes
font_01_sfnt_off000080c8.bin
6459abddfc517eb820e74f445d11c721ce0fe64dad12fc6c66145df86e640532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C8 10632 bytes

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