Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7dc48544cfc089…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 01:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c68e015d7cea47570a5f2dd8b86762f4 SHA-1: 013ec0e96b0923d2b2eb383f3a31ffca01d5150e SHA-256: 5b7dc48544cfc08976df11f273d884c34685b86aa0013866f59f28f5041ca57c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.club, which is associated with distributing malicious content. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure for potentially harmful content. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm tactic to obscure the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=brazzerspasswords+2019+hack+apk In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8725122567ee40dab0aea424436dcdea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f454b93d6fad41bc85e70e7b7c8c3dd3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/850f07_9afa9b4dd9f3463b8e676ab960d34296.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2b3f46_1f6aa48d29ee420f95b027ddcda48aeb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9b7d8a_64fed6e860164b35bfe111be6041f086.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_253cc0ff78e042fdb1ed281ec2f3713b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/famexezoven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/fesosamenonukojadusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/xifozonamusodamobin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/saddleback_basic_english_grammar_book.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ae059d_5113581035c44d60b3054bb1e3ff25db.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ea2f88_ebf9cd6c325e47f6b8db7adbf02ddbae.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006318.bin
0ce2c867f07633cb916b5e92b692e35f94cda8ef37c64400236737eb48741303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 5868 bytes
font_01_sfnt_off00007727.bin
fe451c66a80c1f442840e1b41e9a95d6c9f76b9492125e17036666a2efe6ea14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7727 10476 bytes

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