Malicious PDF — malware analysis report

Static analysis result for SHA-256 918c54f2f519af4d…

MALICIOUS

PDF

36.8 KB Created: 2020-08-23 20:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 656d1886fd496f6edb63adaed8506c4c SHA-1: eb371d97584fdedb0692bf16baef5cb6abfdc350 SHA-256: 918c54f2f519af4d978215ffd6630acbdcd4f7e53d6130ac49db3454d7ad97c2
120 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 Shopify domains hosting PDF files. One of the primary links, however, redirects to a known malicious domain 'ttraff.ru'. The document body, though heavily obfuscated, contains references to 'Kannada dubsmash songs' and the malicious redirector URL, suggesting a lure to drive traffic to malicious infrastructure. The heuristic firings confirm the presence of malicious redirector links and a link farm.

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=kannada+dubsmash+songs
    • http://files.erikajuran.com/uploads/1/3/1/4/131406258/5670387.pdf
    • http://files.naturalpediatricmedicinellc.com/uploads/1/3/1/3/131383493/bikageru.pdf
    • http://sited.tnquarterhorsesales.com.au/uploads/1/3/1/1/131164112/wepabavebot.pdf
    • https://cdn.shopify.com/s/files/1/0463/3113/4113/files/sigebavajiloxozepojagan.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/34985909437.pdf
    • https://cdn.shopify.com/s/files/1/0461/8318/6585/files/bluetooth_peripheral_device_driver_for_dell.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/wifepigazawemujew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/21503241217.pdf
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/visavavolupiju.pdf
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/az_100_dumps_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/tetibipeva.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/most_common_idioms_and_phrases_with_meanings_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/kimegazuperelagimimuxebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/dojeribivotofa.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_off00004ed4.bin
df2510a78e1f25c4b20d5306987b0e2a5f619b4f51f3491945cf760951c16623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED4 5220 bytes
font_01_sfnt_off0000606e.bin
8fedf18d086d3d9e39bdf1ad2fa9d27d74cdcf7d387ecd8d513857483ba7c9b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606E 11788 bytes

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