Malicious PDF — malware analysis report

Static analysis result for SHA-256 86728be2f5cccafe…

MALICIOUS

PDF

54.0 KB Created: 2020-08-29 03:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b635b1ea6e4f1b3f1f5ea95e01a4ff8 SHA-1: 2f0fd355b6dda7d20768787af7d136df5b217fc7 SHA-256: 86728be2f5cccafe56188714174c78ac31ef59b03b9aa9ec45b97fde042a7f91
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, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.ru'. Another critical heuristic indicates a PDF link farm, with the first URL pointing to 'cdn.shopify.com'. The document body contains text related to 'Town of Salem invest' and the authoring application, suggesting a lure or phishing attempt.

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/wix?keyword=town+of+salem+invest
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/jawuxerubotoderufolubudir.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/tifizifizatukojewizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/xaxorexatedujo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/learn_akan_language.pdf
    • https://cdn.shopify.com/s/files/1/0439/9097/4622/files/shoulder_arthroscopy_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/act_not_working_ffxiv_2018.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa573429fb52486d9ceffad07794d9fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_09afb7bc9c834125bc5547bdd4df0aea.pdf
    • https://cdn.shopify.com/s/files/1/0457/4121/1804/files/angular_formcontrol_default_value.pdf
    • https://cdn.shopify.com/s/files/1/0432/8534/8510/files/balidageboloxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/sample_email_format_for_job_application.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4540/files/cessna_310_manual.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_off00009708.bin
b8c26c204f93a9fb8bdbf0b0bf4bd7c556ad11265e4b6d082a7ede8e490275a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9708 4916 bytes
font_01_sfnt_off0000a7d1.bin
da3a8f5d90861f082529813d75ac521eacd4a509ff01fc468416290b8a8bc5f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D1 10376 bytes

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