Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c7013ab4c913d1…

MALICIOUS

PDF

43.5 KB Created: 2020-08-17 11:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b56e5e12f53a68c922422a831ba0bdd8 SHA-1: 6b07899047efecbd289852899d28a8c857e5c35d SHA-256: c3c7013ab4c913d10e657041a5ea27113779e9cfff5e9c8f1d738168f81368f5
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 external resources, suggesting a link farm or redirection attempt. The primary malicious link, https://ttraff.cc/pify?keyword=arenas+movedizas+libro+malin+persson+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, reinforcing the attack pattern of luring users to malicious infrastructure under the guise of providing a book download.

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=arenas+movedizas+libro+malin+persson+pdf
    • http://files.outxfitness.com/uploads/1/3/1/6/131606396/pavowolawugetofesamo.pdf
    • http://files.crystalfoss.com/uploads/1/3/1/4/131454316/415341ba6d6e319.pdf
    • https://cdn.shopify.com/s/files/1/0447/9824/7069/files/neuralgia_del_nervio_ciatico_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/7110/3395/files/agile_project_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/4678/9542/files/loseguminenomusuriza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/wobafofulimegiwibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/15032010371.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/texew.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/change_calculator_java.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/96565149042.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6778/files/standard_abbreviations_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/89038495289.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/44984899690.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_off00006ce9.bin
26737b83c8484566db3fe5a75bda5a4b7082dc1d616567b72afb2c1fabe12f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE9 5424 bytes
font_01_sfnt_off00007f4a.bin
b06a8d78fe12638385d68a47aff7cf3a463c1092da7bc633a97c78406d7f940e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4A 9948 bytes

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