Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcb24843e498f36…

MALICIOUS

PDF

55.9 KB Created: 2020-07-29 18:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03c1d4f6915220d15be859b68a23e452 SHA-1: 2ffb0f18f29a7e72954add76587aef71fb5e2042 SHA-256: 2dcb24843e498f3680b297d5da758fc616d5bc0e4bfa54cd536b24c224ddba0c
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous links, including one to a redirector, strongly suggests a phishing or malware distribution attempt. The ML classifier also provided a high confidence score for 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.cc/pify?keyword=5+axis+cnc+machine+pdf
    • http://files.mumbisdesigns.com/uploads/1/3/1/4/131455956/1aa818e155bc84.pdf
    • http://files.wccperk.org/uploads/1/3/1/4/131437174/jesurutezitokorubago.pdf
    • http://files.premierpropertysvc.com/uploads/1/3/0/9/130969352/latavenuzuwudan-lelut-bejumomipele.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/xumovixezun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/xuxex.pdf
    • https://cdn.shopify.com/s/files/1/0435/7698/3713/files/5465824266.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/54353426248.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/tajerusezasulipobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/rurososazujivezomofadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/dumav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/12698124011.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56070096689.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/bezosipitowuruvovujewesi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/29930840088.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/vezopojaregusarotiwa.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_off000090db.bin
ebd2f2ef93eae2f731e0ca304ce8ef9e8d1d43ecb64403f0971b9a2b50e4baec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90DB 4960 bytes
font_01_sfnt_off0000a180.bin
c0d5c7ae84eeb81c491b690badf9cc3e1c74c22da3819f30580b95a002564785		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA180 10052 bytes
font_02_sfnt_off0000c3f9.bin
16a900b78e39b301665055026e8328d3462c99a2d5d08c6360dc5b7345123734		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F9 3772 bytes

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