Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebe5d034236e62b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-22 14:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd849f146e6271839af06c691e3395b9 SHA-1: 9c2a2ad66d1e46524b27ed1336e87c26f89bd931 SHA-256: 7ebe5d034236e62b41b7f8cf591ac95a7a9f12b9a3fec1ceaf98824247270853
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a sample inventory sheet, designed to lure users to a harmful destination. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms this, and the ML_NYX_PDF_MALICIOUS score indicates a high probability of malicious intent. The document body, though heavily obfuscated, contains the malicious URL and other benign-looking PDF links, likely part of a link farm to improve SEO and disguise the malicious intent.

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.cc/pify?keyword=stationary+inventory+excel+sheet+sample
    • http://files.colactrees.com.au/uploads/1/3/1/4/131438180/potinese.pdf
    • http://folupe.bayareamuslimtherapists.org/uploads/1/3/1/3/131379163/1096155.pdf
    • http://files.bonnyinteriors.net/uploads/1/3/1/3/131398555/kanusorogudajenix.pdf
    • http://redajav.kangarooclubhouse.com/uploads/1/3/1/8/131872055/8035393.pdf
    • http://files.traceyg.com/uploads/1/3/1/1/131164387/zuxudolevofu_sugen_tomuxejuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/37820796419.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/powerpoint_template_website_design.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/paganini_caprice_24_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/jeffrey_campbell_platform_sandals.pdf
    • https://cdn.shopify.com/s/files/1/0457/3187/2934/files/converter_arquivo_para_autocad.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/15798850369.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/magedigitosemaro.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/barron_toeic_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/24213188274.pdf
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/simple_amplifier_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/tibefimewavixesefapitupom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.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_off000068bc.bin
549526bd0ec7436ca62501f00e4aab320ba4a6a05898d2d748ab87d3a25dab76
pdf-font-stream PDF embedded font (sfnt) at offset 0x68BC 5504 bytes
font_01_sfnt_off00007b53.bin
5d495a1a86133a49cf6a7c9613900b27c34761c381b016ab014ef17df5a4176a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B53 10008 bytes