Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da1eced23dd72f8…

MALICIOUS

PDF

39.1 KB Created: 2020-08-30 12:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9721306321505f98fa6c3a248f0453a SHA-1: d7ee62fc2e5642f4a2164391a1a6c91adbe3d846 SHA-256: 4da1eced23dd72f87c0f7a0e67ab9b799d40e1fe1bd5da86d9e0127f6eaddf99
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is 'https://ttraff.ru/wix?keyword=tera+elin+sliders'. The document body contains obfuscated text and embedded URLs, reinforcing the malicious intent. The presence of numerous links to Shopify-hosted PDFs suggests a coordinated effort to distribute content, likely for SEO manipulation or to host further malicious payloads.

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.ru/wix?keyword=tera+elin+sliders
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/71643093998.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/kingdom_heart_1._5_remix_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/caboolture_train_line_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/83240270813.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/ravogivug.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/tisugera.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/devuxokaxenawalewikixez.pdf
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/temporale_prpositionen_bungen_a1.pdf
    • https://cdn.shopify.com/s/files/1/0440/8419/9574/files/blockchain_game_theory.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/ravumodufeberinibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1019/4582/files/computer_arithmetic_algorithms_and_hardware_implementations.pdf
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/97075349304.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_off00005b36.bin
3e7802104ec6ca63ff49ae1b26ce6ebc13764c4e1a6998f7d3427613678d275d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B36 4768 bytes
font_01_sfnt_off00006b6d.bin
b1ead63777eec1a960c6bd6f02c7be9b5ec1c6c026ec313cf634367a9e77814d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 10980 bytes

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