Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66dcbaf8dfdff75…

MALICIOUS

PDF

47.2 KB Created: 2020-08-15 05:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75375370934c5a52f84a7bade57ad763 SHA-1: 6265378f1daf1dd0b9a85f7552fdecbdffee9fd8 SHA-256: e66dcbaf8dfdff75e8db663a1a40c98f933d4b9600c595726ed99c2c7bc9cf0d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the text 'Microbiology lab instruments pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a malicious redirector indicates an attempt to lead the user to a site that likely hosts further malicious content or exploits.

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/wb?keyword=microbiology%20lab%20instruments%20pdf
    • http://jawetojub.karatecup.cz/uploads/1/3/1/6/131607131/221fd038670c52.pdf
    • http://files.puregassa.com/uploads/1/3/2/7/132710755/mevuxemidinifofer.pdf
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/jokarekoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/p._r._i._c._e_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8424/files/65896548198.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/sons_and_lovers_autobiographical_novel.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/vugodij.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/dilivuliwuzosawogofifen.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1447/files/bryson_tiller_don_t_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/21015263953.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2557/files/typescript_dictionary_type.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/88050716669.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_off000079e2.bin
e06db9dfc911f5486f743bca91f1f8a8a7df1b3c5be5b78dff7cad5be4335c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E2 5724 bytes
font_01_sfnt_off00008d47.bin
7f1b0501d78f942f6b3b15ad2595618dd02b0bc4619beba7cc93739ae7bde234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D47 10248 bytes

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