Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0ee5c5f1cd50ce…

MALICIOUS

PDF

40.8 KB Created: 2020-07-20 14:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b798d4a7949da0dddd73c417d20944 SHA-1: 8fa0b34e252ebb6af07be8a244af50404ffe5db1 SHA-256: dc0ee5c5f1cd50ceb31db63ff4cc0ec235fdb3993bbaf977a60aad122a9d77ab
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). This indicates a link farm strategy, likely intended to obscure the final malicious destination or to distribute malware. The ML classifier also strongly flagged this PDF as malicious.

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=challenge+and+thrill+of+pre-college+mathematics+pdf
    • http://files.groundingclimbs.com/uploads/1/3/2/7/132712120/7432328.pdf
    • http://files.rogerscitymarina.com/uploads/1/3/0/8/130873717/9516886.pdf
    • http://files.innovativetruth.org/uploads/1/3/1/1/131164442/975212.pdf
    • http://files.groundingclimbs.com/uploads/1/3/2/7/132
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/gobobilariwonijifuzabusok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/73740158896.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/zatinekuwoba.pdf
    • https://goxapexuti.files.wordpress.com/2020/07/19684085874.pdf
    • https://guzuteju.files.wordpress.com/2020/07/moxovozazimorison.pdf
    • https://legesidubaso.files.wordpress.com/2020/06/49943152786.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/buloxoraludexezuxarovekix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/vozadiromejebefaxizujudeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/33052787423.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82505274200.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/4090002743.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_off00006225.bin
62f9149898ede27922a23f56d7d590878f6b789acc2b0580a2665416b60bd00f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5412 bytes
font_01_sfnt_off00007466.bin
e9f3b7d41edebc5570bfe9085fbf82943e21d3ceca808c5033fd0283e1c88ef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7466 9848 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.