Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d0897151faac44…

MALICIOUS

PDF

51.2 KB Created: 2020-08-08 11:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04d7dfe64a222a11f6aff94c66819ab8 SHA-1: 7ae51a7a502868bc6bac16656e39184c51b44cbe SHA-256: 19d0897151faac44da7d7e167acb0c46b84e602543272348bf26aabbed8e8f72
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify and other domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains references to academic topics and the URLs suggest a lure to download PDF files, likely to disguise malicious redirection. The primary intent appears to be directing users to malicious or spam content through a deceptive link farm.

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.ru/pify?keyword=upsc+mains+anthropology+syllabus+pdf+download
    • http://files.ocatilloaudiovisual.com/uploads/1/3/0/8/130874359/lokodesobe.pdf
    • http://files.406cavoodles.com/uploads/1/3/0/8/130874655/zilazokojixafa.pdf
    • http://files.goallpros.com/uploads/1/3/2/3/132302749/benonaselune-mevafifuwexam-vujapi-xujibu.pdf
    • http://files.promisegarden.com/uploads/1/3/0/7/130775402/683d788f.pdf
    • http://fexuf.isawiitch.com/uploads/1/3/1/1/131164243/gagixaset-fepumowe-janiwitifutuwiw-pabexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/77503356031.pdf
    • https://cdn.shopify.com/s/files/1/0435/5745/3985/files/inversiones_bursatiles.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/bais_yaakov_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/lamugaruso.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/brokeback_mountain_screenplay.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/7547518037.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/33550220067.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/a_question_of_power_bessie_head_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/xaxivenit.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4652/files/asme_y14_5m_1994_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/wipavetekikaguxikaju.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_off00006d89.bin
db6fe004598d2b9b183e8580865803b8498e3abe7f366b8463073317d1835866
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D89 5896 bytes
font_01_sfnt_off0000817c.bin
5ae0e13d986578489dc0d1069901dbdae8d3ab78ce56378491c2253f48ad1919
pdf-font-stream PDF embedded font (sfnt) at offset 0x817C 12128 bytes
font_02_sfnt_off0000aa04.bin
811776956d0b1f89c09bcbfbcda3f036884cdce0b7857604712f2e3f276a6025
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA04 16064 bytes