Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81f4acb508c71b7…

MALICIOUS

PDF

47.8 KB Created: 2020-08-18 21:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d5110c5f1ecde0166c81699ae7cdd4 SHA-1: c26b08509dee9dbb054c659d6bef68a2c3544745 SHA-256: c81f4acb508c71b788d5474917870606a02a17cf963b085072c6e2184268b99a
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Hd movies hub app' and a URL that aligns with the malicious redirector. This suggests the PDF is designed to trick users into visiting malicious sites, 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.com/pify?keyword=hd+movies+hub+app
    • http://nadanije.coburnsandandgravel.com.au/uploads/1/3/2/7/132740214/lakekozijifitagotev.pdf
    • http://files.myportlandtherapist.com/uploads/1/3/0/7/130775690/jolupirififazi_mizimitulilofa_dixizelil.pdf
    • http://nilufurox.rmkvapor.com/uploads/1/3/1/4/131453109/9a6673.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/fukusisunarome.pdf
    • https://cdn.shopify.com/s/files/1/0433/6785/8334/files/38921940026.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/70232385259.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/14924494986.pdf
    • https://cdn.shopify.com/s/files/1/0435/0309/1876/files/catalogo_bticino_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/32605537887.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0391/files/sopinovalexuxizujenanoku.pdf
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/38245657183.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/bloqueo_auriculoventricular_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/surugezafobixene.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/gonojanuvuposakuxat.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0167/files/glass_mask_manga.pdf
    • https://cdn.shopify.com/s/files/1/0438/4591/0678/files/firikavasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7999/files/71468907345.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_off00007ba4.bin
bfdfa4f6c2a57de1b818d7f81950631b7fbef0df7a0036ea44c1d91da189310c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA4 5232 bytes
font_01_sfnt_off00008d50.bin
5d85ce8deca44850455e118c272cf83b63e4762d3b31aeb15edbab5a791f0841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D50 10844 bytes

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