Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ecd2d9b8124602…

MALICIOUS

PDF

55.9 KB Created: 2020-08-04 03:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2696ee462906079f44993621d8123d0 SHA-1: 2bc09984195ca1a69675fa3a4b2cc50e52951151 SHA-256: 87ecd2d9b8124602cdbfe802e177ee94f1898d9f12eb1db710e114f89db46825
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=fun+periodic+table+worksheets+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to lure the user to this malicious redirector.

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=fun+periodic+table+worksheets+pdf
    • http://files.iamterrancebonner.com/uploads/1/3/1/3/131384113/2501225.pdf
    • http://delik.carpetcleaning352.com/uploads/1/3/2/6/132682989/ropefemeretesov.pdf
    • http://files.decgallery.com/uploads/1/3/1/3/131384789/cc8b20d.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/vufadunot.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/4143094767.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/7557734076.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/48260512075.pdf
    • https://cdn.shopify.com/s/files/1/0431/5316/2394/files/xoxerawidikos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/samsung_c410w_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/jidulereperaxoxonafipija.pdf
    • https://cdn.shopify.com/s/files/1/0440/0224/6814/files/vapizamatufokijuvovudaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/69875203488.pdf
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/77631525210.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/vejobamufoligizanifazuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/72621142739.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/69994716244.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_off00009cae.bin
f689751f391fd0f941e24d7c247296c6ddee4aa8b28621723f2515966bf788f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAE 5496 bytes
font_01_sfnt_off0000af69.bin
678b2ec9d02334f42282b3d72657480504a2c11d295fb08bfe5f77973c5fc883		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF69 10240 bytes

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