Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7f6ffe7f6e02ac…

MALICIOUS

PDF

43.2 KB Created: 2020-08-29 03:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65f5cc3d9ae204cf5f7fcf3dc8252708 SHA-1: 276145cd755460de7e3568e2b2dfc0bf8ab11248 SHA-256: 1f7f6ffe7f6e02ac34ea178c891e644cb549c937ce0e5d37e5f0ac74ffb5845b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=conceptual+mathematics+a+first+intro'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking title, suggesting a lure to a malicious site. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of a phishing or redirection 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/wix?keyword=conceptual+mathematics+a+first+intro
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/jidunawebiba.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/gulp_on_error.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/13989546043.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0498/files/73902457829.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/59020330371.pdf
    • https://cdn.shopify.com/s/files/1/0449/3810/0891/files/50446407293.pdf
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/excel_2013_date_format_day_of_week.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/74338621897.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/jidutaxokavo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/xegitovikop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0796/files/baxaf.pdf
    • https://cdn.shopify.com/s/files/1/0459/2710/4679/files/lotevusuwusikefefofulef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/75371772793.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/poziwalarezelejose.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_off00006c99.bin
2fa5b3184ceed6a74cfad6aae8a358ae67218d3bf2ea305968ceaf89b8f44281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C99 5160 bytes
font_01_sfnt_off00007df3.bin
50eb13ecf9046b23baba4a7c18039a1412160e9a5d2bb86a3f63a8f6f3a58bc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF3 10008 bytes

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