Malicious PDF — malware analysis report

Static analysis result for SHA-256 a546cfaf5d7d046a…

MALICIOUS

PDF

54.5 KB Created: 2020-08-29 06:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 704046d5c0aa3346171a98e59dce5768 SHA-1: cf29e05dfaa1f9fde1bd1c0b3c1bacfa0f57ab3e SHA-256: a546cfaf5d7d046ad74f97056a1b6c224d9eb511aa3441bb60993561921b1b91
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves luring users to malicious sites via these links.

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/wix?keyword=dark+souls+how+to+jump+attack
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/mijokexofumezab.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/ordering_rational_and_irrational_numbers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/gapojop.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/kolejesovas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/railway_station_code_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/dakiduvusekokadilelanux.pdf
    • https://cdn.shopify.com/s/files/1/0436/0519/6957/files/79198438016.pdf
    • https://cdn.shopify.com/s/files/1/0461/7306/1273/files/370040652.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/nurebojusowixijesanovopel.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/navpers_1616_27.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbed24747424c868d89aeb25c9ee842.pdf
    • https://static.usrfiles.com/ugd/b8c837_d17db36ffd7a4e5c8cbb7c4f97faa918.pdf
    • https://static.usrfiles.com/ugd/b8c837_e285629aa57b4869b8e57c127a89b030.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000983a.bin
7f9a62d1270688e0bf4abdd6c838fc35bbb450bd92313ce2b497ed82650ceb26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x983A 5404 bytes
font_01_sfnt_off0000aa93.bin
40947c19442bb869b837f6b27fc298d58a209e2d0c0f60124be0d18567dcbaca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA93 10168 bytes

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