Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb85d424e605914b…

MALICIOUS

PDF

54.7 KB Created: 2020-08-21 03:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06339d263252b7d10da99a09c562377c SHA-1: 15630a0ca8e0beee87560c96f57bbbaa449cbc90 SHA-256: eb85d424e605914bf976badfe7de7fd14429d0941445df2db10861d5672ac691
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=fosroc+expandafoam+data+sheet', is designed to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=fosroc+expandafoam+data+sheet
    • http://files.ulstl.com/uploads/1/3/0/7/130740211/benewut.pdf
    • http://files.despairandangst.com/uploads/1/3/2/6/132681164/dbe25.pdf
    • http://files.landandairphotoworks.com/uploads/1/3/1/4/131409463/roxejak.pdf
    • http://wisafija.catarellaphoto.com/uploads/1/3/0/8/130873947/fejixelu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/70540083506.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2967/files/83354018585.pdf
    • https://cdn.shopify.com/s/files/1/0439/2848/6056/files/22294503895.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/20218797326.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/6663919405.pdf
    • https://cdn.shopify.com/s/files/1/0445/4681/8207/files/editable_discharge_papers_fir_hsving_as_miscarriage.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/lujives.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/58198139819.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/alphabet_letter_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/dulutexefepiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/94690993629.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_off00008d3e.bin
9ea0182226a4aaad9eaf959082af9dfa0d6c4b9168046b37b75fa0170891710f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3E 5388 bytes
font_01_sfnt_off00009f6a.bin
1105501205a96c49f5c58e9639bf3358c2c543d095a3f8e509523ced4fdfc4ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6A 14844 bytes

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