Malicious PDF — malware analysis report

Static analysis result for SHA-256 3913f803cf7a8fe3…

MALICIOUS

PDF

54.1 KB Created: 2020-08-22 22:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87acc63bb8c56945e0130059d85e960f SHA-1: 5f65af1240c907dbcb639501c27188559e5155ba SHA-256: 3913f803cf7a8fe37353d3733bed3763dd0bb0d68dfbbd27ef8aa2e954a0c2a3
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'new hire document checklist template' and a call-to-action phrase, suggesting a social engineering lure. The primary malicious IOC is the ttraff.com redirector, which is likely used to funnel victims to further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=new+hire+document+checklist+template
    • http://files.coejl.net/uploads/1/3/1/3/131379820/5174833.pdf
    • http://files.cefcentralindiana.com/uploads/1/3/0/8/130814397/2052734.pdf
    • http://files.avanseansanm.org/uploads/1/3/0/8/130814728/719520.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/jiragadad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/6946151365.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/expanded_notation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4613/2129/files/gigasuduviw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8251/4585/files/tazelesepufidukamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4160/3239/files/convert_to_word_free_zamzar.pdf
    • https://cdn.shopify.com/s/files/1/0429/7519/9391/files/mozara.pdf
    • https://cdn.shopify.com/s/files/1/0466/5281/7573/files/zokan.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/33382932757.pdf
    • https://cdn.shopify.com/s/files/1/0438/2733/1232/files/timopunawemejapora.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6572/files/rogezolusosedaduf.pdf
    • https://cdn.shopify.com/s/files/1/0436/7033/9737/files/sample_cv_template_uk.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_off00009507.bin
2f15fbc10789c736a50267a8856aa391965684db88ea8661d3c8dddc9c81fb74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9507 5436 bytes
font_01_sfnt_off0000a76c.bin
bc24f7d7bdecf1ee9a9a24be3acb12dee630f687a6ec00f5336a56ada2c76e18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA76C 10536 bytes

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