Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c7833fb6401e7a…

MALICIOUS

PDF

53.8 KB Created: 2020-08-05 10:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63fb5df3bdf146ef54293841396bcf10 SHA-1: 0b8d84114c95f8b03b4dbf27c10263b20a191359 SHA-256: b7c7833fb6401e7a8595d2199484e2054bec3a0502a7e2e511b546a05a10d132
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text as the redirector's keyword parameter, suggesting a lure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, with a significant portion hosted on 'cdn.shopify.com'. No scripts were extracted from this sample.

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.com/pify?keyword=assessment+for+learning+examples+pdf
    • http://files.ryanshay.org/uploads/1/3/1/6/131636689/nofekoz-vazasesovosubeg.pdf
    • http://wijasoled.roadslaves.com/uploads/1/3/0/8/130874064/6636522.pdf
    • http://files.heritagehousepreschool.com/uploads/1/3/1/0/131070508/8541401.pdf
    • http://files.mountainairdance.com/uploads/1/3/0/7/130739704/7145587.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/wamovirutalukuvaxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/5924/7264/files/xuzaduvini.pdf
    • https://cdn.shopify.com/s/files/1/0435/6413/8651/files/62333026867.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/datoroxewafanafix.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/novel_cecilia_wang.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/pixutojekepapig.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/39994422608.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/xaduzapub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8718/3515/files/19322713640.pdf
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/wow_pathfinder_tracker.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/39894573412.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/icu_report_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/sofodesamudutij.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/zovosabadopelogenos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/theory_of_metal_cutting_and_machine_tools.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/
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/39894573412

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092d5.bin
ae1fa1b1990f67b80a2e7b41842b2851a316ce29e4cfeb790dc4ce06a01bca14
pdf-font-stream PDF embedded font (sfnt) at offset 0x92D5 5420 bytes
font_01_sfnt_off0000a534.bin
589cfed5d626227ce61aab2590a06e4aa9cdb4bdb3e4f9011f4addd198ac9d23
pdf-font-stream PDF embedded font (sfnt) at offset 0xA534 10748 bytes