Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5aa0c2f39477a9…

MALICIOUS

PDF

41.2 KB Created: 2020-08-01 19:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82c0957dce620b5b0e65e4c09d8c8b72 SHA-1: 41f71b84b8f403c03c9c696b18982876ee97d929 SHA-256: de5aa0c2f39477a9bff193fdf827756ef4b8d59a880dd3f493de4e52211d9067
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious redirector URL. This suggests the primary purpose is to redirect the user to a malicious site.

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=imperial+gardens+poe
    • http://files.vanbarfitness.com/uploads/1/3/0/8/130873804/8128251.pdf
    • http://files.thesearenotmygrandkids.com/uploads/1/3/0/7/130776208/pamalofosa-xobanot-ripofix.pdf
    • http://files.ktminvestment.com/uploads/1/3/1/3/131384721/2007006.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/jexafam.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/46652206983.pdf
    • https://cdn.shopify.com/s/files/1/0430/2887/3367/files/pejite.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxupajajivamuwiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1884/files/kekivozubafijutatugad.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/jebimut.pdf
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/23646558518.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/gelemorugano.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/dubavelif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35403674757.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/74751144879.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/74894355718.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/59589630989.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_off00006343.bin
9abfd8925235c9bf6827013706f49075df9ea38da2eb064a7ed374ab7857ed2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 5216 bytes
font_01_sfnt_off000074e4.bin
9d162589ac4f44929c39f9b38f083f5aa85a812dced64c180c327ce0e9ce4ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 10424 bytes

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