Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e46846adca53d5…

MALICIOUS

PDF

32.9 KB Created: 2020-08-16 16:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d347b6b98ad139ea81f28b15e3201d4 SHA-1: 7c54b8167513f48614c015e84dc6677d93535ac1 SHA-256: f5e46846adca53d5d824101800852bc26b46cdf2fc3f7e0a7f54f8bf24c9228b
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 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'Chariots of Fire' music sheets. The presence of a PDF link farm heuristic further suggests a campaign to distribute malicious content. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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=chariots+of+fire+free+music+sheet
    • http://zomime.psychiatristsofdenver.com/uploads/1/3/2/6/132696021/vefup.pdf
    • http://files.rowanfirstyearwriting.com/uploads/1/3/0/7/130739379/vedumilagex_wexifegaki_tafawufinujixa_danoxedafog.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/bulisatejid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/31504597202.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/project_report_on_online_food_ordering_system.pdf
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/6638691362.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/adverb_of_time_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8090/files/56940618340.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/emerging_approaches_to_educational_research_tracing_the_socio_material.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_off00004321.bin
1d18da54bb96b1f7ef99af5fed79c737e95e7674e2eba538c51d5e0fc3039cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4321 4996 bytes
font_01_sfnt_off000053fb.bin
514600ce5216a95d795ffbf6147a76ba80d4f3db210452e6fc74e517686d8f4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53FB 10256 bytes

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