Malicious PDF — malware analysis report

Static analysis result for SHA-256 423fcb28f2d453d3…

MALICIOUS

PDF

51.2 KB Created: 2020-08-05 23:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93f680875a3da37ef812a561fb55dc1e SHA-1: 0819770e33de73d46a61851c2045941a371d6b8c SHA-256: 423fcb28f2d453d3818b6ae1f57707b8731c8b49fa45cff51c43eb0d6bbcb73a
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, pointing to 'https://ttraff.com/pify?keyword=can+i+search+a+pdf+document'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0434/9768/5157/files/73645396056.pdf' being a prominent example. The document body, though heavily obfuscated, contains the redirector URL, suggesting the primary intent is to redirect users 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.com/pify?keyword=can+i+search+a+pdf+document
    • http://files.northridgeoptimist.org/uploads/1/3/1/4/131483830/4810789.pdf
    • http://files.rotarykwinanafurnitureonline.com/uploads/1/3/2/6/132681415/1d721c12f8199b.pdf
    • http://files.amoryshelter.com/uploads/1/3/1/3/131398367/mipiwovomemi.pdf
    • http://kupewu.tccoloradocup.com/uploads/1/3/0/8/130814017/6c923fcdb0.pdf
    • https://cdn.shopify.com/s/files/1/0434/9768/5157/files/73645396056.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/gadedewadut.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4501/files/yekaterina_makrova_porn_star.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/vowepefinimivunaxoteno.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/10231853797.pdf
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/dososuxolefuvovanosofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/23820369579.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/how_to_encrypt_a_folder_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/vokesetebuzilunufovixuli.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_off00008375.bin
bf63f1fcc2f791baf7988914842f44de0709f3e2415f4b4d7e4148efb726d309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8375 5268 bytes
font_01_sfnt_off00009536.bin
a4f00d20fb2af7eade78ca8bce8b4785992cf53e578efdb5ef867e16a4da9330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9536 13388 bytes

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