Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b3609c1c63bd9a…

MALICIOUS

PDF

40.9 KB Created: 2020-08-17 14:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 928f6af6205dd95d729ca87fa95671f9 SHA-1: 474220eaf35559777beec49385bee383a2dcc1df SHA-256: 39b3609c1c63bd9a1d83ee39fa0f2db1c367277095e5f62fe0bbe0d80488ce9d
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, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=gametes+are+formed+by', is flagged as a known malicious redirector. The document body itself is heavily obfuscated but contains references to the redirector URL and other embedded links, including one hosted on cdn.shopify.com.

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=gametes+are+formed+by
    • http://files.sgionet.com/uploads/1/3/0/8/130874413/zujojunejiguwimurob.pdf
    • http://korumi.nforchestra.org/uploads/1/3/2/6/132695384/dosim.pdf
    • https://cdn.shopify.com/s/files/1/0450/9813/9813/files/kawija.pdf
    • https://cdn.shopify.com/s/files/1/0447/4057/5381/files/caries_dental_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/soul_memory_dark_souls_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/5806248765.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/69560861510.pdf
    • https://cdn.shopify.com/s/files/1/0436/8806/7225/files/fowiteraled.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/another_balancing_equations_sheet_chemfiesta.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/relesimasibubiwejewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/canada_post_rates.pdf
    • https://cdn.shopify.com/s/files/1/0439/3022/2747/files/mikokoxijopafolizegidu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2270/1976/files/40833948917.pdf
    • https://cdn.shopify.com/s/files/1/0431/0938/4345/files/business_analyst_course_content.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/acura_tsx_manual_wagon.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_off00006452.bin
664336a1771c6c2eb5670038f49b69840c83ee4599aca26ce64e117f18d4b0f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 5296 bytes
font_01_sfnt_off00007649.bin
416089c3c26ceeac31c6c1b5e4e6d10ce42ee39fe188aba07eff11cf14592162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7649 9680 bytes

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