Malicious PDF — malware analysis report

Static analysis result for SHA-256 98cdca2bcb181151…

MALICIOUS

PDF

37.8 KB Created: 2020-08-03 02:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f90b2eb139dfb3a67a9f2292869b359 SHA-1: b6ebe8ae8d5430e8b8708a9ad2578daf5eb307ca SHA-256: 98cdca2bcb181151308297a13a1fb5b65d93c920f8bd252a96ad83fb81dc222c
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 'https://ttraff.cc/pify?keyword=goodbye+blue+sky+tab'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious redirector URL. These elements suggest the PDF is designed to redirect users to malicious sites, likely for phishing or malware delivery.

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=goodbye+blue+sky+tab
    • http://files.beenwheredonethat.com/uploads/1/3/1/8/131856173/63f59ad0dbd.pdf
    • http://files.saltedsage.com/uploads/1/3/0/9/130969577/fd60d610d.pdf
    • http://files.paeoniapines.com/uploads/1/3/1/4/131406841/gumezekibox_resuri_didodizo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/kelurigodakuxipa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/limuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/wopobetujolisadutarud.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/53031804738.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/zusaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/sigixuguxofidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/vewegenefurobefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/77609866395.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_off0000526c.bin
e3482037d347ac05e9fae9da656eabe09f3020026a2c3ecf16a4d1f7e666f0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526C 5060 bytes
font_01_sfnt_off000063bf.bin
2d561fc356cb68d2812646e9a81cef57c510b8c38f4bc49648cdda2099d4141f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BF 12348 bytes

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