Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb096ebdd9879eb6…

MALICIOUS

PDF

48.0 KB Created: 2020-07-22 08:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 991caec85484fafb1aeb15d68ab202f8 SHA-1: 03d21340ef0476055a56d8d04637352f484b21ad SHA-256: eb096ebdd9879eb6fd1294ec60b45c359445d41363259b4c1e4dcaee2fef1c07
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body disguised as a manual. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be directing users to malicious infrastructure via a deceptive link.

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=aikon%20f42020%20manual
    • http://files.oriental-collection.com/uploads/1/3/1/8/131856188/649c415eed1db8.pdf
    • http://files.massmediamaker.com/uploads/1/3/1/8/131871980/mijimeko-bekub-kikakede-jemuxerarotigok.pdf
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/valojer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/rugenijunekolalifenu.pdf
    • https://tizatovizux184684867.files.wordpress.com/2020/07/1313303145.pdf
    • https://kupakibavu.files.wordpress.com/2020/06/86855970709.pdf
    • https://vewulox.files.wordpress.com/2020/07/luxupez.pdf
    • https://xuvugumodad.files.wordpress.com/2020/07/sufuxotevewedovetironomal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7256/1050/files/34288459079.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/64591692374.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/vumutazemazemej.pdf
    • https://cdn.shopify.com/s/files/1/0432/8783/8886/files/5044687653.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/15281864180.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/54471082606.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/zifurawijenuzob.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/
    • https://kupakibavu.files.wordpress.com/2020/06/868

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fc6.bin
90be134a91c0f7afa0b0da31b13c326293fb9babc1a3e396333bc623547f84f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC6 4736 bytes
font_01_sfnt_off00008fbe.bin
37cf5f37575ea365c0c5eddd6608769670b6efdd335607f6c4284fbcca6503f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBE 10256 bytes