Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb2e0432caf57b3…

MALICIOUS

PDF

86.6 KB Created: 2020-08-08 08:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f749758e775ab9c4cf32a700e272cd SHA-1: a74648b7a2a772c832823175f1b54991e66f184b SHA-256: 8bb2e0432caf57b33a9effdc8509cc6a94bde683e4235d11ef694b4b58acf630
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a harmful site, likely for phishing or malware delivery.

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.ru/pify?keyword=amphiphilic+block+copolymers+self+assembly+and+applications+pdf
    • http://files.now-hope.org/uploads/1/3/1/4/131409009/pawaram.pdf
    • http://files.heatherseastheworld.com/uploads/1/3/2/7/132710575/8189334.pdf
    • http://files.yournewschool.com/uploads/1/3/1/4/131438639/kurorumu-romig-rejew.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/sales_and_marketing_cv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2586/6662/files/2540893008.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/44391536282.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/fokuwelajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/67002292785.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2518/files/69960124382.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/11387836331.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/5919476418.pdf
    • https://cdn.shopify.com/s/files/1/0430/1612/6625/files/59192186924.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1894/files/19666200268.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_off000106b2.bin
a5c2c25168f52dbe60692958622397fca676b74364888be0ffe1745f0f448eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 5688 bytes
font_01_sfnt_off000119e4.bin
ebc7860a775841e2e0ca0d27b44e6221b12c655fd957a46f7434b09cc0214cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E4 16716 bytes

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