Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e938e5aa45e8d9…

MALICIOUS

PDF

37.5 KB Created: 2020-08-25 12:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 856d6e6e2718c4231e47a1c6b406bdce SHA-1: 714aed7d96f97b7833b2286d65ef111d1eda2428 SHA-256: 54e938e5aa45e8d9cdbda1ba04061788c36eeb3daa7b9486e61b91246b262bec
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=atomic+mass+number+and+isotopes+worksheet+answers'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation or to obscure the final malicious destination.

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=atomic+mass+number+and+isotopes+worksheet+answers
    • http://files.orourkewellnesscenter.com/uploads/1/3/0/7/130776841/lotafesemezub-pipoki.pdf
    • http://files.the21stcenturybody.com/uploads/1/3/0/8/130813108/2542227.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5252/files/99515794187.pdf
    • https://cdn.shopify.com/s/files/1/0447/1246/0444/files/63393768502.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/award_show_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/xululusuwodasetevemir.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/android_mobile_3000_to_5000.pdf
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/colour_blindness_test_book_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/dipen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/intensive_care_society_staffing_guidelines.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_off000053a1.bin
673ea3cc15c3267f3894fa7405dd5f38bca85b01dd6e51d5847777f9501cb61f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A1 5564 bytes
font_01_sfnt_off00006665.bin
cbd00b454a50570be85f44532aa3fb8e07fd5322d0ddfe831314da19d17046d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6665 10212 bytes

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