Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7952e4c792415ce…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 06:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 832d6065c3c6bc6b595b1a611e31f39e SHA-1: 10334181065c5f43285727714e70957cdf169fc0 SHA-256: d7952e4c792415ce81311e1c0261ab39f80d4a5c3d86850a8b3f94d4776c5abd
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site. The presence of a malicious redirector indicates an attempt to deliver a secondary payload or conduct phishing.

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.com/pify?keyword=atrial+septal+defect+information+in+spanish
    • http://wutukon.farquharfinancial.com/uploads/1/3/2/6/132696323/volur.pdf
    • http://baxitu.cencalcablefishery.com/uploads/1/3/2/3/132302978/2015742.pdf
    • http://xonil.reconnectfit.com/uploads/1/3/2/7/132710712/28f26019fbe42a.pdf
    • https://cdn.shopify.com/s/files/1/0436/3082/1529/files/petusewufig.pdf
    • https://cdn.shopify.com/s/files/1/0439/0099/3704/files/64891685144.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/memimivazosojigoru.pdf
    • https://cdn.shopify.com/s/files/1/0446/4757/9811/files/anemia_aplasica_severa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/23689674432.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/tirinumufujif.pdf
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/fawunifenixedalezatasik.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/kugokefalonuvegezexiga.pdf
    • https://cdn.shopify.com/s/files/1/0432/7276/5598/files/30915796306.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/ib_biology_textbook_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/devoreguzinikenukawerapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5920/files/sexerenogarezutig.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/2506917580.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1408/files/cgegis_table_december_2020.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_off000062f0.bin
18413eae82d2e74f5114340ca04c7cd27abf34b9acda0f84c9c91c3a9fe77536
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F0 5384 bytes
font_01_sfnt_off00007508.bin
c46aa180802a2b6f33acd859b82f618945c1bdced083f7ec4407be2eae4f4c7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7508 9780 bytes