Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d806ac5a696031b…

MALICIOUS

PDF

47.9 KB Created: 2020-08-17 01:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06b52452f3796c7ba2b975e6dbe4e7cd SHA-1: 7fd379904e23cb93aed8f3ada535aa9592fe7c62 SHA-256: 4d806ac5a696031ba9aeb2907f81542d780bfb03aadc2674a5b7b5dc6fa886ee
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a high school diploma template. The primary malicious URL, https://ttraff.cc/pify?keyword=high+school+diploma+template, is flagged as a known malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. 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.cc/pify?keyword=high+school+diploma+template
    • http://legin.gabrieleraussewinery.com/uploads/1/3/0/8/130813765/kuzupem.pdf
    • http://legin.gabrieleraussewinery.com/uploa
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/78334236750.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/mihail_bakunin_kitaplar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2312/files/demewolujut.pdf
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/saxevonikewajizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/bivogiramegawis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7783/files/18101371320.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/rilenitenobibe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/dark_souls_sound_effects.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/46877721246.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/12th_time_table_2020_arts_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/american_vision_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/34499721973.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_off0000724c.bin
270a0de963e3e40a325adf2ff4436a676803825574857b906d4eb01cd5fca8b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724C 5036 bytes
font_01_sfnt_off0000836c.bin
04f21ba926b75276e65b47b58d21e5124a382536a608cf3fe4f2623a4f8e3f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x836C 9744 bytes
font_02_sfnt_off0000a48b.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA48B 4324 bytes

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