Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6193eae22ba40e…

MALICIOUS

PDF

39.3 KB Created: 2020-08-24 22:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 750e7fb9cf5690e5aa603568053f44ab SHA-1: 4fc72e0c8718e21067cb38b180dcce271a33cc6e SHA-256: 2e6193eae22ba40ef60877bad9cdd0a9a1517a349d19abd8b0985f38f4ca1b15
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'dolch sight words worksheets free' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external resources, including benign Shopify URLs and other unknown URLs.

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=dolch+sight+words+worksheets+free
    • http://files.centralcoastdahlias.org/uploads/1/3/0/9/130969884/592948de634.pdf
    • http://files.mezarte.com/uploads/1/3/1/3/131379719/duzidenelulutal.pdf
    • https://cdn.shopify.com/s/files/1/0448/1371/3569/files/bone_thugs_mo_murda.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/multivariate_normal_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/kijipitulon.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/gedis.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/poemas_de_amor_gustavo_adolfo_becquer.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/rukeneraredumowux.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/nebuvegop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/report_dangerous_driving_online_west_yorkshire.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/nimaxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/chaos_knights.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_off00005d19.bin
5c8973b13ca6a37df93985517748e0a86dbf6a8ebf22443f819f02031209b963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 5228 bytes
font_01_sfnt_off00006ef1.bin
9be618ecbf0cc59d4401763f670582965605ec672856ddd5e191e52d53e075f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF1 9788 bytes

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