Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eec78cdd199273b…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 06:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2a516f074b23c291e67dcaad00b54d6 SHA-1: fed670958e4d5bb8e9cf519e59de60ee25307265 SHA-256: 2eec78cdd199273b18061c96859150bedf8c35f6b27a49de4510e87c54a8d134
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=mycology%20test%20pdf'. Additionally, a PDF SEO link farm heuristic indicates the presence of numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a lure to a malicious site, likely for phishing or malware distribution.

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/wb?keyword=mycology%20test%20pdf
    • http://files.freshsage.com/uploads/1/3/1/3/131384301/3820895.pdf
    • http://files.draytonmkc.com/uploads/1/3/1/8/131871907/bixopigorazes-tikiniro.pdf
    • http://files.artistsnorthfork.info/uploads/1/3/1/3/131380263/6827460.pdf
    • http://files.lauriamusic.com/uploads/1/3/2/7/132740267/1544716.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/economist_september_1_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/zerupifuxisimamusatusuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9160/6170/files/jevizuxapividewoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/richard_burton_arabian_nights_16_volumes.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/30155314490.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/95928035044.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/cartelle_tombola_da_stampare_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/92086320803.pdf
    • https://cdn.shopify.com/s/files/1/0433/5645/5067/files/peredin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/bilutozixevizuzixofuxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4375/6954/files/530053131.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_off00006627.bin
15b5309fd5da69d03c5b5fa08956c996806a713391efc4df37a961fe830efe01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 5124 bytes
font_01_sfnt_off000077c0.bin
01c25dec869423f6d2d092dadb2bccc2d763d89c706c88cf14ca2f4dd364d851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C0 10416 bytes

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