Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23370cd381d5798…

MALICIOUS

PDF

45.3 KB Created: 2020-08-05 00:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9e46b7112ea07c94379f3238ead7715 SHA-1: 00c5036fdc2f09f78598aee7083f79824b14a0fc SHA-256: b23370cd381d5798de2f64d577f0817b7a8291bea2ba45ebccef02ea3278617b
128 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 embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and several other PDF links, suggesting a coordinated effort to distribute malicious content or phish users. The presence of a 'download button' lure further supports a malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=causality+assessment+of+adr+pdf
    • http://samopodo.victorialandis.com/uploads/1/3/2/7/132740978/liduvosakopuzam.pdf
    • http://files.scw9.ca/uploads/1/3/0/9/130969176/1576028.pdf
    • http://files.ncappartnership.org/uploads/1/3/1/3/131384127/tewega-riwibadazetu-nabululukot.pdf
    • http://files.somax-consulting.com/uploads/1/3/1/4/131453405/pavekenamuwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/66239614831.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/57690959436.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/lesufinagimukiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/wagujidojupesi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/nijazipajixubib.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/61014727922.pdf
    • https://cdn.shopify.com/s/files/1/0428/7840/2723/files/dolenosiriwofitora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonamanasalusowalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/28166226777.pdf
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/alphabetical_order_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/mysql_delete_row.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/56426956797.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_off0000748c.bin
90c665540c72d57d130b456ccedceedf7347d9431f1152da871e9ffc0c4be658
pdf-font-stream PDF embedded font (sfnt) at offset 0x748C 5196 bytes
font_01_sfnt_off00008625.bin
f4b7d01845bde44b2747d6cdceb057d651cfc9be76fb860f185bf35ee60069ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8625 10296 bytes