Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a16441c54e0d704…

MALICIOUS

PDF

59.4 KB Created: 2020-08-09 03:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c047b3c036f28e888c4142ddf909cb95 SHA-1: 5a82b6d926512a0886f3bcc35f7e275c92d21d41 SHA-256: 1a16441c54e0d704d1af4fe285fc2a329563150671ba6c479a1307b7484af638
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=albert+camus+the+stranger+pdf'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, including 'https://cdn.shopify.com/s/files/1/0436/1509/2894/files/curl_send_post.pdf'. The presence of a 'LOLBin Run Command' heuristic suggests the document may contain instructions for executing scripts or commands, likely to facilitate the redirection or subsequent payload delivery.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=albert+camus+the+stranger+pdf
    • http://files.5men104years.com/uploads/1/3/1/4/131483154/9035809.pdf
    • http://files.bnsathletics.ca/uploads/1/3/1/3/131378899/fakukel.pdf
    • http://files.braznstudio.com/uploads/1/3/0/9/130969746/2a9c3bc2d6.pdf
    • http://files.theputterroom.com/uploads/1/3/0/7/130738507/xoxotoveziku-xutope-jinomusarerifup-madaxum.pdf
    • http://files.koshek.net.ua/uploads/1/3/1/6/131606003/378354f.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/curl_send_post.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/thats_my_purse.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0373/files/govemalexez.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/dewej.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/ravijijivi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4080/6824/files/39871851587.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/negimikegadusolopule.pdf
    • https://cdn.shopify.com/s/files/1/0436/8554/4089/files/rogijizukubupulataba.pdf
    • https://cdn.shopify.com/s/files/1/0438/7966/1736/files/js_force_html_redraw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/femuzamijenoriberupakox.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/49512363041.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/
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/curl_send_

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000093bf.bin
86f447779e3a9c127541aecbf3de38c78d198cca737ceef54d05c85d9835244a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93BF 5700 bytes
font_01_sfnt_off0000a6f7.bin
b3f144699118381804379f2b1cfc07793c5a534191ea0344a745a82671cefb26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F7 10560 bytes
font_02_sfnt_off0000cb10.bin
d98a9309e076b13835c6659d635ae6c9662cc733e578b44ec6f104cfef2f50ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB10 16100 bytes

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