Malicious PDF — malware analysis report

Static analysis result for SHA-256 c381f0db25def4a4…

MALICIOUS

PDF

46.3 KB Created: 2020-07-31 21:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8ccfdca0aaaeae5632a9f689838ca1 SHA-1: fe89972a6f04764c0cca5728e0f149d35efacc5b SHA-256: c381f0db25def4a451d0b2da28a37762d22a1f93bf34fc51ca69e031bc0cf951
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.001 Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=change+notification+background+color+android'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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=change+notification+background+color+android
    • http://files.electronpotential.com/uploads/1/3/1/4/131408209/520518.pdf
    • http://files.ninjagoats.org/uploads/1/3/1/3/131398428/negiku-muzosufifono-vejalaxo.pdf
    • http://files.ifreestyle.ca/uploads/1/3/1/3/131398000/xusuwaje.pdf
    • http://files.miyakostudio.com/uploads/1/3/0/7/130776291/sawujojurisolow.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/79244644651.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/nijipebiwezoserelusiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7803/3313/files/pujagiketumamuxinubilusuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/2819/9062/files/82367293613.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/93579037954.pdf
    • https://cdn.shopify.com/s/files/1/0430/5564/4823/files/83147145448.pdf
    • https://cdn.shopify.com/s/files/1/0435/5974/7745/files/ragove.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/10238702723.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/44709889398.pdf
    • https://cdn.shopify.com/s/files/1/0429/1595/4847/files/57966219853.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/bufoxonituzu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/927644107.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_off000068aa.bin
c3d52ae6d2a4d375f74d49e395d5d22972646bc92821c98e8c9f67cf27b443c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x68AA 5212 bytes
font_01_sfnt_off00007a55.bin
fde507d3e12ec33e68adf7e75fc7402ffd28b0db1492fb6dd1e3c49ab7b9519b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A55 3120 bytes
font_02_sfnt_off000086da.bin
40a74b8bdfb0123b6373a1629b3d277238146159a5226b265171c53fbb01766b
pdf-font-stream PDF embedded font (sfnt) at offset 0x86DA 10620 bytes