Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfbc1f039c253d1…

MALICIOUS

PDF

54.7 KB Created: 2020-08-09 19:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eb1f36183c632ceb64591fa42d139de SHA-1: f81f71ecc303cc58f391dfc6036b3b01a3150909 SHA-256: bbfbc1f039c253d16201ee09d60606121de47bbf484ea57a3a8f3654705ede0a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple heuristics indicating malicious redirection and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=shakespeare+sonnet+30+pdf, which is used to redirect users. The document body, though heavily obfuscated, contains references to the topic 'Shakespeare sonnet 30 pdf' and the tool 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous external links, including one to a potentially benign Shopify URL, indicates a broad attempt to distribute malicious content.

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=shakespeare+sonnet+30+pdf
    • http://dagebun.bestoftimeswatch.com/uploads/1/3/0/8/130873951/621ecd1736.pdf
    • http://mefem.alisonpeters.net/uploads/1/3/2/3/132303035/denow.pdf
    • http://files.msyoungteaches.com/uploads/1/3/0/7/130739503/gadulipe_gafikedefokeb_gikirukiwodomu_verurin.pdf
    • http://miniwava.permtech.co.uk/uploads/1/3/1/4/131453674/b78096fb1.pdf
    • http://files.thenativenortheast.org/uploads/1/3/1/3/131380728/9940785.pdf
    • https://cdn.shopify.com/s/files/1/0430/7560/0535/files/awk_linux_command.pdf
    • https://cdn.shopify.com/s/files/1/0434/0082/2934/files/historia_carabineros_de_chile.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/selenetarunitizovir.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/7835887628.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3931/files/61816504443.pdf
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/usb_killer_diy.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/assembler_des_linux.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7782/files/46101678302.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/87695057184.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/gusutotawajo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/kisobipujisit.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/ziserifixitaposuwefusuxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/21227027565.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_off000097f8.bin
3667d7e63803e1989901672b8e8f60210e9f20d59f530f096f5172e2968c0095
pdf-font-stream PDF embedded font (sfnt) at offset 0x97F8 5572 bytes
font_01_sfnt_off0000aae8.bin
971f9f944e435483a211916eeb826651d5a64baa430e97796642b0e5aa3eb19e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE8 10144 bytes