Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e7ca1d59b546e3…

MALICIOUS

PDF

39.7 KB Created: 2020-08-10 02:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53fb0313cc6884bbebe07661d3c79978 SHA-1: a0e452e66a11d3acb82ee7c18ea5293c8be0c2d9 SHA-256: b0e7ca1d59b546e385417b39a12f80226e7a62be62b40c1d2e0b381ce9f6a5b7
140 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body, though heavily garbled, contains text related to a book download and the malicious URL, suggesting a lure. The presence of a callback phishing lure heuristic further supports the malicious intent. The primary attack pattern involves redirecting the user to a malicious site via a link embedded within the document.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=aula+internacional+1+libro+del+alumno+pdf+free+download
    • http://files.allure192.com/uploads/1/3/1/8/131856907/rufafifixuwudiruwo.pdf
    • http://mawafamex.reggaeclassictouch.com/uploads/1/3/1/1/131164250/ruxepapofebete.pdf
    • http://nolipes.trippbibleinstitute.com/uploads/1/3/1/4/131407406/8297a7586e.pdf
    • http://files.thaitogether.org/uploads/1/3/0/8/130874593/8392690.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/arriba_6th_edition_answer_key_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/nukujasumadoxexenegenin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/tosezavewenajoziv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/74540435567.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/begifaxexanezim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/wafuje.pdf
    • https://cdn.shopify.com/s/files/1/0439/9464/4638/files/free_automobile_bill_of_sale_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/zatade.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9646/files/485190721.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/notsobot_invalid_search.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/65604330667.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/vba_for_macs.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/boluzo.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_off00005a42.bin
92ec003ac86b434d5c8a43153f5458f8fc75fd1c3132c4407c5225c00450bc25
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A42 5396 bytes
font_01_sfnt_off00006c9b.bin
98cc09a05ced9e26cae1c6046d800183ea3306ac4dae0a86edc67236f9ce0fb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9B 10792 bytes