Malicious PDF — malware analysis report

Static analysis result for SHA-256 214a9f27a8e95558…

MALICIOUS

PDF

37.4 KB Created: 2020-08-24 10:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bccc002d61ecd2bf9374bd696d374fc SHA-1: 047dfd3de3b7606ee9ad81dc05276dda9b764b06 SHA-256: 214a9f27a8e955583d616d6bc01586eba3b13d170acaca7b7fe29ccfcb2eabfd
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, a tactic often used to obscure malicious destinations. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to ttraff.com, a known malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many hosted on Shopify, which are likely part of a link farm designed to distribute malicious content or phish users. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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=born+in+evin
    • http://werufiko.glenkeith.org/uploads/1/3/1/8/131856476/korevusubum.pdf
    • http://rakeg.brauerhomeservices.com/uploads/1/3/1/4/131453574/90e60e32d771.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/makukiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7505/0395/files/32652683760.pdf
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/movimiento_rectilineo_uniforme_variado_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/james_bond_gun_barrel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8610/files/ludusovugiwimuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/lafuwafa.pdf
    • https://cdn.shopify.com/s/files/1/0438/9063/9016/files/73983613581.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/48134399942.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/dudolalafudove.pdf
    • https://cdn.shopify.com/s/files/1/0434/6026/4096/files/besag.pdf
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/simple_jquery_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/x26_bus_timetable.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c53.bin
448dd8bda19a2bccf9b35aa7b428b41a52569c7642d2dee07317f8cd6418e0a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C53 4076 bytes
font_01_sfnt_off00005a1c.bin
1b7a0ada6581193525dcb13c7006d4136385772f5b4e01b23ba673e7dd7a516c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1C 9688 bytes
font_02_sfnt_off00007b46.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B46 4324 bytes

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