Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37ebfda80b309fd…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 18:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87efd17c9ed69c6ccad3b5ff7c16593 SHA-1: 6621c8e1a87575aaf8c3b9c42004393c5cd2b23f SHA-256: b37ebfda80b309fd3e49f1a3151faf4262ed18c694a06f818736e98661bf3f59
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious link is https://ttraff.cc/pify?keyword=android+studio+gitignore, which likely leads to a malicious payload. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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=android+studio+gitignore
    • http://files.ilovejuellez.com/uploads/1/3/1/3/131379894/7659722.pdf
    • http://files.salutecug.com/uploads/1/3/1/6/131606186/f546490093.pdf
    • http://files.nhtelephonemuseum.org/uploads/1/3/0/8/130814462/gojizoweruko.pdf
    • http://files.cabads.net/uploads/1/3/0/8/130874018/juvewolafijajet_toxebebekan_desowakod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/69752409883.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0398/files/7534340139.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/57434780405.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/vapekarakokabex.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/vofedikusozotejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6183/files/best_squarespace_templates_for_photographers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/tabofawi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/32055170756.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/client_engagement_manager_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/hard_short_riddles_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/change_to_word_document_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/6004/3682/files/lolagobu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000596f.bin
7ef25159ad113fff55294b91e55ac91e952024a5c44e31cceced173ffec729d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x596F 6904 bytes
font_01_sfnt_off00006af0.bin
af4def00ff4d69b216ef372ea3c9960508d3b45b3a72b46c6024ded31c9f573b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF0 4740 bytes
font_02_sfnt_off00007b19.bin
b44208a5a17f58a50642b720bad68388aee7f0bf728c3e06e5741e59a208027f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B19 10776 bytes