Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf9f55ac971cc62…

MALICIOUS

PDF

48.4 KB Created: 2020-08-20 01:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d13e8af42ea73696a3cb81088d93cae SHA-1: d67ae827d41ed3925cc9f17dc6520061f198f04f SHA-256: ebf9f55ac971cc62763a0e70adb614ad27df7c5ad5dac60c851d82e7e5821819
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to Excel and a URL pointing to a redirector service. This suggests the document is designed to trick users into clicking malicious links under the guise of providing useful information.

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.com/pify?keyword=excel+merge+sheets+based+on+key
    • http://files.ctenbrinkphotography.com/uploads/1/3/1/4/131408942/fec7a8.pdf
    • http://teruras.jairobanuelos.com/uploads/1/3/1/4/131412713/43802801.pdf
    • http://wudin.castaicbassclub.org/uploads/1/3/1/6/131636612/1712995.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/neriv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/14318766185.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/xaduzikazijufiwezobiku.pdf
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/powered_by_phplinks.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/around_the_world_in_60_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/subarachnoid_hemorrhage_guidelines_2012.pdf
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/stokes_equation.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/server_certificate_for_google_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0437/4721/3464/files/67100545398.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tekutuni.pdf
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/fizek.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_off00007d2f.bin
28384255a6ad81ac7b7ea27f8311b57c3283ba5a5e42d990a7a8b68c593ed24b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2F 5684 bytes
font_01_sfnt_off00009064.bin
d1ddc24bde45582db6ecb9f22eed29124b8b3752030bc7183ea9077c18dbb51c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9064 10652 bytes

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