Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a90be19e1849201…

MALICIOUS

PDF

43.7 KB Created: 2020-08-05 02:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a0ab5381831addcdeeb7ba3f5d64e8b SHA-1: b6c458aaae5cc9ce2949c3e3a30cc324c1785db1 SHA-256: 3a90be19e184920121eea14faef2d85b36eff302fe74f9a998494f5a68a2f560
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and embedded links present a lure for 'javascript tutorials', directing users to a URL that appears to be part of a link farm designed for SEO manipulation, ultimately leading to a malicious redirector. This suggests a phishing or malicious content delivery attempt.

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=javascript+tutorials+point+pdf+free
    • http://files.antiquecues.com/uploads/1/3/1/0/131070230/zunutuwip.pdf
    • http://files.bgrtampabay.com/uploads/1/3/0/7/130739906/vikegexamaju_jikekud_gugisoroka_bavimew.pdf
    • http://files.nevisatnight.com/uploads/1/3/2/3/132302944/bilegivitotexakuwezu.pdf
    • http://files.brensuelabs.com/uploads/1/3/0/7/130740458/papopuduxizuzex_jelinu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/vididobevifurisegoma.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/10602289834.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/sugafo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/achieve_ielts_1_english_for_international_education.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/ubuntu_install_postgres_9._4.pdf
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/92005938976.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/melaliwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/case_brief_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/sajedutatizolazirurelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/totavigewuzu.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_off00006955.bin
85449829637a2fa2565e9813919250f71a3cd7af33d634fdc4826b2e5435556f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6955 5196 bytes
font_01_sfnt_off00007b1e.bin
577be1106179056e844c1af00acb4c43cf9542e966c8af95096230a8398cd6cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1E 12016 bytes

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