Malicious PDF — malware analysis report

Static analysis result for SHA-256 b138a6ba4e7895d4…

MALICIOUS

PDF

61.0 KB Created: 2020-08-12 16:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60234c5b93bb5088ecba013e7785b035 SHA-1: 05275a80a3435ac2f423ca882d587dc596defd61 SHA-256: b138a6ba4e7895d49961f39672f24057e5bdca3f262c28c8a22ac398efc9ff15
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves luring the user to this redirector, which likely serves as a gateway to malicious content or phishing pages.

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.cc/pify?keyword=estudio+cardiologico+de+framingham+pdf
    • http://pilasite.david-rickard.net/uploads/1/3/2/6/132695306/kajesagodenu_rizasezezaxalev_zokufeg.pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • http://files.leslie-marshall.com/uploads/1/3/0/8/130813146/palubagodo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/86174222667.pdf
    • https://cdn.shopify.com/s/files/1/0429/1202/2691/files/afasia_wernicke.pdf
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/nuwopiliribitoker.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/530262831.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/vezoneroveligasumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/fujemej.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/kunuvodozubekexav.pdf
    • https://cdn.shopify.com/s/files/1/0432/0369/0660/files/juneau_county_star_times.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2415/files/ubuntu_deleted_files.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/16906574467.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/vujerapobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/67934494151.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/vijudufezotejazeze.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/66177296213.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_off0000afe5.bin
a5459961b970cbaa0eda1346b823ee6a234d40771bd040bc985aa5c210e7ce1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE5 5524 bytes
font_01_sfnt_off0000c285.bin
7f0847403020331643242651a4420295f33cdb4225386cae39db2c1ba0e9fef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 10568 bytes

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