Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5f81b1a0b5b68e…

MALICIOUS

PDF

37.9 KB Created: 2020-08-20 13:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 501f0e0a7a06056d04f8d335555e0e23 SHA-1: 2eb68a6b93f5b7b64c5cba230ad074e751f4c54b SHA-256: df5f81b1a0b5b68ee79ae6a49afd6da26312eb214b1493deba64e1b3e883357b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a mass external PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=equilibrant+force+pdf', is flagged as a malicious redirector. The document body is heavily obfuscated but contains references to URLs, suggesting a lure to external content. The primary attack pattern involves redirecting users to malicious sites through these numerous links.

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=equilibrant+force+pdf
    • http://files.jonyeager.com/uploads/1/3/2/6/132696154/pedetenagupu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobirunutopuwipigodilig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/install_windows_on_mac_without_bootcamp.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/42813430603.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/51483342645.pdf
    • https://cdn.shopify.com/s/files/1/0463/2723/4722/files/audi_r8_wallpaper_for_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0440/3258/9989/files/basics_of_technical_communication.pdf
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/89170447201.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/2347279829.pdf
    • https://cdn.shopify.com/s/files/1/0441/3059/9064/files/punojelavopatidafizen.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_off00005648.bin
65bef0a05b49592e15098e9dd440f8c5f9fec95e587a6ae154db3517948df717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5648 5192 bytes
font_01_sfnt_off000067f6.bin
4f82cdeb893cf17a78d6d333067184c164e451ad3f2ae9239aaab88a47d26764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F6 10500 bytes

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