Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb4c5847cb43726…

MALICIOUS

PDF

123.6 KB Created: 2020-08-10 02:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ca95951cca36b5758b0311a72e1da7 SHA-1: 9214433c2d94d9c965771001c6edb1114e6f1591 SHA-256: 3eb4c5847cb437262ac7544477eee7de4b76668890e77073c0266dcd4f599bcd
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a practice PDF, aiming to lure users to a malicious site. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate the document's intent to redirect users to potentially harmful content. The ML classifier also 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.ru/pify?keyword=bangla+alphabet+writing+practice+pdf
    • http://files.ikargb.co.uk/uploads/1/3/1/4/131453598/70ff451e3d49ba.pdf
    • http://files.bobdyerspeaks.com/uploads/1/3/2/6/132695543/4575605.pdf
    • http://files.conklinbarracudas.net/uploads/1/3/0/8/130874110/budulerusuwuvi.pdf
    • http://files.wowpartyrentals.org/uploads/1/3/1/8/131871740/3925202.pdf
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/50269431333.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/9040609191.pdf
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/vonoruzefidelaxilazolefad.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/65710947757.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70339383958.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/totepowubavujubiwirob.pdf
    • https://cdn.shopify.com/s/files/1/0430/5443/2410/files/17950694120.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/60307698963.pdf
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/nefun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/82466450859.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/4782373432.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/34779528269.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/73968558322.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011279.bin
a3dfbaf3e77a99abaa9d91e99cc89dd9a5b92638bef7003f5ca3494d56df63bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11279 5520 bytes
font_01_sfnt_off00012547.bin
347d8acc95d8bb0e7387c1a10ccf500d8fc44697640fb1a1b01721b9faf94985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12547 60128 bytes
font_02_sfnt_off0001a416.bin
8696cac4056b150195038d6b8504d467798537110583ab826694d1c835e657c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A416 17300 bytes
font_03_sfnt_off0001d6c2.bin
d534fbb1df5870f4714ac0c8dcb51fa987e585ff217de7be8564674757bd014c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6C2 2280 bytes

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