Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8e1906b7497e99…

MALICIOUS

PDF

60.7 KB Created: 2020-08-21 03:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e56f716f8d7426cd1390248dd58009b2 SHA-1: 2ad1171f1bb5fac0c0029a4b2658d4ad296bfe8a SHA-256: ee8e1906b7497e99b48a12f4638de535d9397ac01d79999b92d2ffeff7904082
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=philips+android+tv+usb+adb'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to various PDF files hosted on Shopify and other domains. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, also contains the primary malicious URL, suggesting a lure for phishing or a scam.

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.ru/pify?keyword=philips+android+tv+usb+adb
    • http://files.jamesmccrackenlcsw.com/uploads/1/3/2/7/132740905/jexovuvadet.pdf
    • http://files.darbsterkitty.com/uploads/1/3/1/6/131637811/vogalugofopub_xemafojejumis_xopunopox.pdf
    • http://files.heysantaman.com/uploads/1/3/0/9/130969408/f641816e79ced6.pdf
    • http://bogisub.imagineadv-webbanners.com/uploads/1/3/0/9/130969162/ae5825f.pdf
    • http://files.christianlindke.com/uploads/1/3/0/8/130874067/79a5730.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/british_english_accent.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/sf_bart_map.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/62371705696.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/ritimusezugerozi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/74874798682.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/before_i_fall_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/65491112482.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_off00009876.bin
c9fc54983f4a9478b110c56931832902e01399d63106cce8e76d9c2b98f0f885
pdf-font-stream PDF embedded font (sfnt) at offset 0x9876 5012 bytes
font_01_sfnt_off0000a957.bin
b9c980f25c2abf88db05cdf772bb2559ca48617331db57ede8517ded27a706c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA957 14704 bytes
font_02_sfnt_off0000d782.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD782 4324 bytes