Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5fb562880de106…

MALICIOUS

PDF

45.9 KB Created: 2020-08-21 11:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8aafa48c4a0eeb740395d5045272c5d SHA-1: 1de38e6ce4caa6a0158ca565611d60b2300879f8 SHA-256: ad5fb562880de10667449f26d6cb183852b7d4ffbe70f7d734d4ef37dec780eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the malicious URL and references 'Baldi's basics in education apk ios', suggesting a lure for potentially unwanted software or malware. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that this PDF might be part of a multi-stage attack where an archive is protected by a password provided within the document.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=baldi%2527+s+basics+in+education+apk+ios
    • http://rabom.pareto-chart.com/uploads/1/3/1/4/131453574/c8f27cf1a6.pdf
    • http://files.willardenvironmental.com/uploads/1/3/0/9/130969356/tekudamo.pdf
    • https://cdn.shopify.com/s/files/1/0439/8258/6014/files/behaviorisme_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/jerupu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3028/9311/files/92348672358.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1237/files/vupinavivexonasajuvos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/fejisileguj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/fifeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/57096978043.pdf
    • https://cdn.shopify.com/s/files/1/0429/6507/4086/files/25913538008.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/85098737765.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/26430451408.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9820/files/ancient_egypt_history.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/fagor_pressure_cooker_manual.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_off000062d8.bin
5c1aa656cb66af94f2a8ad6652645a89c4b720e8c1aedac6d8a911b785d89a52
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D8 5140 bytes
font_01_sfnt_off00007459.bin
df3ba0a98f971c7bddbc6e6af7a948e8a08a0d93ff69d481d47d2ef8451cd950
pdf-font-stream PDF embedded font (sfnt) at offset 0x7459 12720 bytes
font_02_sfnt_off00009c8d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8D 4324 bytes