Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9c3cce6e80a8ca…

MALICIOUS

PDF

49.0 KB Created: 2020-08-30 10:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 904550f0d28126b362dfe25392c91dc8 SHA-1: 4a09e8e3cf1d24f511e556637bcab907d69cf403 SHA-256: af9c3cce6e80a8cafb781b057261e671aa316fd80a64762209c5e9b5cb69e9c7
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used for SEO manipulation or to host malicious content. One of the embedded URLs, 'https://ttraff.ru/wix?keyword=body+types+drawing+reference', is flagged as a known malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document.

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/wix?keyword=body+types+drawing+reference
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/el_neoliberalismo_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3367/files/havering_sixth_form_parent_login.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/node-_record-_lpcm16.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7637/files/berilio_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/20629275459.pdf
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/advantages_of_using_technology_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/42911263644.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/atf_box_latest_setup_12._80_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/4836/0343/files/xiloxudijuzoritijovapu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/vanozelolojigumodu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/79037284297.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/epl_weekend_predictions_bleacher_report.pdf
    • https://cdn.shopify.com/s/files/1/0454/7097/4118/files/81179758329.pdf
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/hungry_shark_hile_apk_android_oyun_club.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_off0000827c.bin
a89910c8206ed983f421ecb9bcf96a9b7a7a65bb2781ed5b3cfba67896873250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827C 5536 bytes
font_01_sfnt_off00009581.bin
a6d087a01717720d7b380b7412a28f7e61330ade8cd805b0ed8f35616a8cf5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9581 9928 bytes

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