Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97d66cbf1bd0bd7…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 04:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac2d115eecf752df520c0d7fc230e27e SHA-1: f7282f820a4223d42116159a72ae05f22bcba9f5 SHA-256: d97d66cbf1bd0bd7b22c51b8a5f2450cb545ecd8777af45e833f3ecb071d659f
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a macOS Catalina Patcher guide. This indicates a social engineering attempt to trick users into visiting a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=macos+catalina+patcher+guide
    • http://files.shortsalesuccessna.com/uploads/1/3/0/8/130814169/niwufit-gurifazux.pdf
    • http://files.parmawellness.com/uploads/1/3/1/3/131398573/bufazalupimurul_lotib_falowur_bopina.pdf
    • http://files.pyroptic.com/uploads/1/3/2/8/132814930/7482423.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/tapipofolapedab.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/wirelose.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/navinikusavupatara.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/32231331403.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/python_list_comprehension_if_else.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/beautiful_smile_images.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/adp_payroll_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/87072374382.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/popidujokagezokaruri.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/96925983315.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/memorex_cd_label_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/akami_netsession_client.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_off0000630f.bin
6bf9f76f0f6aa9f1d98d0d3d0dcc050850b43b13aaae703ebfd4d85ef03bee10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630F 5340 bytes
font_01_sfnt_off00007526.bin
4d436c819d0c8deeb025cb645661fbaa96e2bf395ee107ae0b0522dcb732ea23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7526 10084 bytes

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