Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cbc890b38b8c40…

MALICIOUS

PDF

36.5 KB Created: 2020-08-30 07:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0cda1e4e70390f79e9a7d22ad7dc96b SHA-1: 2adc771ce2b470237839f10d4db0da51aa0aca05 SHA-256: f4cbc890b38b8c407f1c3b87c5f991f4c13e821e1fbca2f6c737da05468c0ee2
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, pointing to 'https://ttraff.com/wix?keyword=modern+web+development+understanding+domains+technologies+and+user+experience'. This URL is likely used to redirect users to a malicious site. The document also contains a PDF link farm heuristic, indicating a large number of external links, many of which are to Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/wix?keyword=modern+web+development+understanding+domains+technologies+and+user+experience
    • https://cdn.shopify.com/s/files/1/0435/9267/9582/files/bringing_out_the_best_in_everyone_you_coach.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/kuxelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/the_witcher_3_interactive_map.pdf
    • https://cdn.shopify.com/s/files/1/0444/5303/6199/files/september_2020_calendar_editable.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/34822636104.pdf
    • https://static.usrfiles.com/ugd/10b11f_557ef9adb0214150a28c22eec9a18ed0.pdf
    • https://static.usrfiles.com/ugd/0049ca_0d6f970e9c424255a7df41243e742db3.pdf
    • https://static.usrfiles.com/ugd/ae059d_9b70a1f14f1d4632bd4f17300e55fe5e.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/copernican_revolution_kuhn.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/mobenorixoneremexo.pdf
    • https://cdn.shopify.com/s/files/1/0461/7076/7513/files/engineering_mechanics_static_and_dynamic.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/541374706.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/biblia_hebraica_stuttgartensia_en_espaol_gratis.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_off00004e41.bin
35e2106bbe84ce429bb2fb257ee84dbe8cf69e1c0e89f8fe748dcecb9534b24b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E41 5852 bytes
font_01_sfnt_off0000621d.bin
42e4d1be17f417fca7978b0c75cc11d888da6a8c29485a6beb5c40220db5f607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 10032 bytes

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