Malicious PDF — malware analysis report

Static analysis result for SHA-256 027eb98b54162551…

MALICIOUS

PDF

72.7 KB Created: 2020-08-05 01:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b79419bf612334e95cac468d77291d59 SHA-1: 91170d09a5d2fa1a6fc38610705f20f33c4b6705 SHA-256: 027eb98b5416255127eb9608a133a3ccd9b4011f5cc47931a6d92e9a5cf78b66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=emergency+endodontic+treatment+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to a malicious site. The presence of numerous other PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=emergency+endodontic+treatment+pdf
    • http://files.gopcffamily.com/uploads/1/3/1/0/131070169/7088299.pdf
    • http://files.waindustrialsupplies.net/uploads/1/3/1/1/131163867/17bd03.pdf
    • http://files.azadlab.ca/uploads/1/3/1/4/131455621/1069650.pdf
    • http://files.liira.org/uploads/1/3/0/8/130813639/woxudoli-velozi-wugipoxim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/36142646750.pdf
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/avery_8167_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/29233708743.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/57655415605.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/application_virtualization_in_cloud_computing.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/77643804888.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8325/files/47452552145.pdf
    • https://cdn.shopify.com/s/files/1/0437/3400/7973/files/car_engine_parts_and_functions_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/nolokezekajekugajakoxazi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/wavigibujakexeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/65792718313.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/7481891947.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/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1cf.bin
15d20d096e6aeeb3a7196d9d85c0595e5974e33ff13844c055bfb9ee9c1ce3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CF 5112 bytes
font_01_sfnt_off0000d30c.bin
b455134215c1f127543c9e9325f175308c359cbf98b278a12a4b01fea3a88c9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD30C 6092 bytes
font_02_sfnt_off0000e2df.bin
8cd6c8793474ac9a81c72eaa4bb0d8810bd81b8b3794bc828c85616c9d3391c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 10544 bytes
font_03_sfnt_off000106c1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 4324 bytes

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