Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb89b8e01ff2d55…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 10:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06cc71418cdcc8ce1c4b6b0c2f505b7a SHA-1: f23dc793c9d788628e9c0b88723cebbe3e3b922b SHA-256: cbb89b8e01ff2d55551a3989093b795564f0ebeaafbae82a9abc0b6ba3fc6660
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=br%25C3%25BCche+ordnen+aufgaben+pdf'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=br%25C3%25BCche+ordnen+aufgaben+pdf
    • http://files.jecinc.com/uploads/1/3/1/4/131437064/2046647.pdf
    • http://files.frankhagancontracting.com/uploads/1/3/2/6/132681404/zatamutofineve.pdf
    • http://files.biomems-supply.com/uploads/1/3/2/6/132695566/borobim-wisobaliratum-zegiriged.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/62563873534.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/tusewuxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/72030989508.pdf
    • https://cdn.shopify.com/s/files/1/0428/7165/2508/files/aprendizajes_clave_geografia_secundaria_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/simoun_episode_1_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/8132517628.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5159/files/mogakogagipivatobagesavuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/bootstrap_background_image.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/nesulokejaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/fairy_tail_276.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/daxalaxeloduruwimubafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/49497385696.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/bosch_boiler_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006014.bin
ea1974be18c7b82dfcc1bde3779892a7405c9a33ce6af6711769298e9f87e372
pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5268 bytes
font_01_sfnt_off000071b7.bin
13c871797fdd3232d2fa6f05d00433e439b0c16430f6edddf130428148c01452
pdf-font-stream PDF embedded font (sfnt) at offset 0x71B7 11212 bytes
font_02_sfnt_off00009658.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9658 4324 bytes