Malicious PDF — malware analysis report

Static analysis result for SHA-256 24dd91c356f658dd…

MALICIOUS

PDF

47.5 KB Created: 2020-08-31 02:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 073cd18d9a514eb88b6f9ce99c0c625e SHA-1: 8dc3409eeaabf368520e698c5ef7d3100d6de6ed SHA-256: 24dd91c356f658dd52abfab79ba031a756851dd3276f7efa8512fb346e881d13
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=rubber+band+weaving+loom+instruction'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0430/8946/1410/files/14664135343.pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains these URLs, suggesting a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=rubber+band+weaving+loom+instruction
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/14664135343.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/82938611979.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/92701828537.pdf
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/67836995335.pdf
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/play_playstation_2_emulator_for_android.pdf
    • https://static.usrfiles.com/ugd/bf650e_04f7d96977564311ba94712f9c5c2fb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa4956cd0a6c44faac8d2f66fbb55a3b.pdf
    • https://static.usrfiles.com/ugd/2f8cea_8278012f9d5642579c3e5cd9bf7ae315.pdf
    • https://static.usrfiles.com/ugd/097bd5_67848763ec9e40a1aec3c1efd94a1529.pdf
    • https://static.usrfiles.com/ugd/79e0dc_c56c5050423842f39088100d6986383e.pdf
    • https://static.usrfiles.com/ugd/3826db_aa50cdaa8eb54c43b9e90c23f563d452.pdf
    • https://static.usrfiles.com/ugd/b8c837_8432177643f44956bbf81b136dba065b.pdf
    • https://static.usrfiles.com/ugd/b28561_7f3a79d07a4f4987af9e3ee797069325.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006415.bin
f102d0fd3e0eac84a9d8230f49e5ae276a4b241f33a497d3a29d21f33bff0810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6415 5556 bytes
font_01_sfnt_off000076f4.bin
1a51ef6735b4f94c07eb3524b054009ee56d87cbe7341c5828d4a02f44ee0957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F4 10232 bytes
font_02_sfnt_off00009a24.bin
4d0b7fceb6e0b8544dba10d314310d86ee7e0ac375a8e3b5fd915ca5fa71995c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A24 16448 bytes

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