Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fd0305f7a8876b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-23 12:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05ab16361ece91c3c81b716a09ca9ef5 SHA-1: 848669b080092203ed904ad2c4e44052f57d913e SHA-256: 48fd0305f7a8876ba884d671cbb9a77e0a5a9681513a714f7176af3296de2cc2
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Fishing report rice lake wi' and the malicious URL 'https://ttraff.ru/pify?keyword=fishing+report+rice+lake+wi', suggesting a lure to a phishing site. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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=fishing+report+rice+lake+wi
    • http://rirolal.relash.us/uploads/1/3/0/7/130775997/a21268077d.pdf
    • http://files.nadiaslamode.com/uploads/1/3/0/7/130776757/9913675d44ed3.pdf
    • http://files.roblightbody.com/uploads/1/3/1/6/131636775/xabukoguru_soxameremapuk_nonibewajuki_xogesam.pdf
    • http://files.christmaswishesbook.com/uploads/1/3/1/3/131398323/nikude.pdf
    • https://cdn.shopify.com/s/files/1/0440/1777/8838/files/hi_rez_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/electrical_lockout_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/26935486634.pdf
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/diabetes_canada_clinical_practice_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/dojuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/22504074176.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/mandate_form_lic.pdf
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/12196912978.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/kagaparuz.pdf
    • https://cdn.shopify.com/s/files/1/0457/6595/1652/files/9091290264.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_off0000614b.bin
a654895ac9db1e10441df7a635a9a92e3b269156905c547a8ad883d0c86f7178
pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 5308 bytes
font_01_sfnt_off0000735d.bin
4a320197cec052fd34623a4faa7f2f4bf475846d32ddc178929fba2d459c92ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x735D 10348 bytes