Malicious PDF — malware analysis report

Static analysis result for SHA-256 2466323451bc6d0c…

MALICIOUS

PDF

36.3 KB Created: 2020-08-22 12:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45765acfe00a75fd26eb16b324b9183a SHA-1: 0088ddab1e77245b25ef6d89d59a54d95c530476 SHA-256: 2466323451bc6d0cdc3b03fcae3d020c0534228825d18922a674424de95fff4d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a link to known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The primary intent appears to be directing users to malicious sites under the guise of providing firmware or novel downloads.

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.ru/pify?keyword=buffalo+terastation+firmware
    • http://zaman.willowynn.com/uploads/1/3/1/4/131437987/lozavajediwezerar.pdf
    • http://files.naturalnat.com.au/uploads/1/3/1/3/131379343/paxewil.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/alif_novel_episode_8_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zikoraj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/clinical_infectious_disease_case_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/essentials_of_business_communication_8th_canadian_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/7246/9669/files/34556375423.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/18589027659.pdf
    • https://cdn.shopify.com/s/files/1/0462/3043/8039/files/container_store_baking_sheet_storage.pdf
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/zegax.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/27303813475.pdf
    • https://cdn.shopify.com/s/files/1/0438/3421/2509/files/vupesofaluzesageka.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_off00005150.bin
da58edb023c8108e36eb4602d33455098182eee0fd3c6ff606d826f448b42b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5150 5052 bytes
font_01_sfnt_off0000627d.bin
cbcde97e5bb909c2becc8a56ea53b31081a3f0b54de7337484e1fcd927d5e45f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627D 10100 bytes

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