Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc7192df5616357…

MALICIOUS

PDF

51.9 KB Created: 2020-08-01 17:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c18fec4fcebdc4a9a01d2eb1a1ec5bc SHA-1: dba000e870fc5014e20ebaaf96dc89c12208cf6b SHA-256: 4fc7192df5616357f3f8601668ca2061ee8c2cba378932dc5a85bd5c1bcb91f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF document contains a heuristic firing for a malicious redirector link and a link farm, suggesting it's designed to lead users to external malicious sites. It also includes a social engineering lure to install a browser extension or update. The primary malicious URL identified is https://ttraff.com/pify?keyword=js+empty+function, which is likely part of a redirection chain to deliver further payloads. The document body itself is heavily obfuscated, but the presence of URLs and the heuristic firings strongly indicate a phishing or malware delivery attempt.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=js+empty+function
    • http://files.divimar.com/uploads/1/3/0/9/130969562/a1267cfcd1ec2b7.pdf
    • http://files.paradiseprintsfashion.com/uploads/1/3/2/8/132813998/443a6.pdf
    • http://files.artfultim.com/uploads/1/3/1/4/131453065/dbe7083d8.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/2997/files/vasujegefutusi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/varefejawowin.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/drowned_city_of_skalla.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/40608701565.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/windows_7_pro_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/17724782719.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/37190587426.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/84752976205.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/58901596771.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/jamonisenomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/kenmore_500_series_washer.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_off00007828.bin
2d244f928144a56b52733c56fa53a82f18e863095502129a7e4ffb965d19bef4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7828 4796 bytes
font_01_sfnt_off00008876.bin
c6ee8f658f48d52debcca91273118214d9f009db4c69f6c39c8980e44f2c7c2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8876 13952 bytes
font_02_sfnt_off0000b514.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB514 4324 bytes