Malicious PDF — malware analysis report

Static analysis result for SHA-256 27714b7dee5bb747…

MALICIOUS

PDF

39.1 KB Created: 2020-08-07 07:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a99af659f5018c30c0905ee6fcd200b5 SHA-1: 58d3c20b6c13a2afd6bd275c31632353dd2dab5b SHA-256: 27714b7dee5bb747c04539599f32f6b2326c00d7ae05e6e9864b9a4a9ef93021
150 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.cc. The document body, though heavily obfuscated, contains the same URL and text suggesting an activity book, likely a lure. The PDF also contains a mass external PDF link farm, with many links hosted on Shopify, but the primary malicious indicator is the ttraff.cc redirector.

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=alter+ego+3+b1+cahier+d+activit%25C3%25A9s+corrige+pdf
    • http://files.rugbysafetynetwork.org/uploads/1/3/1/4/131453588/nukonaza.pdf
    • http://goraramo.bioenergeticsberlin.com/uploads/1/3/1/0/131070450/padotogefixotimasoma.pdf
    • http://files.churchbeyondbelief.com/uploads/1/3/0/9/130968963/2664187.pdf
    • http://files.raypecbasketball.com/uploads/1/3/0/8/130813765/5976588.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/voraludiguzegopopexu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/46897955010.pdf
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/nofuzukegufedikoguvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/45524202188.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/mizamupinesovigaxafekoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/best_biodata_format_for_job.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/pamametiworu.pdf
    • https://cdn.shopify.com/s/files/1/0450/9820/5349/files/catalogo_general_de_cuentas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/midapatidiniwowuperolenod.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/fogipalerosigetoxobun.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/zukidakaworixixawevas.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_off0000560e.bin
31ae6a248d09baf641d005ca244b5c24cf454c384837747a6c46878978d5f85a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560E 5964 bytes
font_01_sfnt_off00006a1f.bin
98137da84a7c56b0b3533407cf9181604edc9886b4756025c06631d9adf18a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1F 10752 bytes

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