Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aee52fd763a6879…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 11:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 510652362c5d3abd743770de2e91ffd7 SHA-1: 28c0178ff7969123c750db43657995ee27d07a13 SHA-256: 2aee52fd763a6879db4db57d0e2fa9285e24bb16a486ebdf0d7ea8f283565842
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=oracion+de+los+fieles+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'https://cdn.shopify.com/s/files/1/0430/9683/4212/files/carbon_black_protection_admin_guide.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting the primary intent is to redirect the user to malicious infrastructure.

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/wix?keyword=oracion+de+los+fieles+pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/carbon_black_protection_admin_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/bending_moment_stress.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9477/files/external_causes_of_poverty_in_tanzania.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/31623130696.pdf
    • https://static.usrfiles.com/ugd/b8c837_070d1d4f9897458b80e5afff15358bd0.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/13558139130.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/83593986651.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/ruvumobubaxi.pdf
    • https://static.usrfiles.com/ugd/ace02d_bb2e86e47fb74dd9913af1b515ecacdf.pdf
    • https://static.usrfiles.com/ugd/b65acf_aeecdcbbfc3e4133866e9f7fa9747da4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7e6b9aec506442bb81726f3c99dc6c3.pdf
    • https://static.usrfiles.com/ugd/5b9a87_821d101a432c4aedb98f60232a354bbb.pdf
    • https://static.usrfiles.com/ugd/5ecadc_760020f92536414084db3a7d2283e5d9.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_off00006b97.bin
f49f1ed2f179820f6bc7c55f2c9f4e74c65555acbb3968ea4d94fd0d4f7bfaba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B97 5176 bytes
font_01_sfnt_off00007d39.bin
62f847c61ddf0bbf4dc36d296c5515a7e33c7a499a90876daba26153a74477ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D39 10892 bytes

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