Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6b61c09781af6b…

MALICIOUS

PDF

77.7 KB Created: 2020-09-07 20:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7babf60780c639b117c8cced7c0bd4a SHA-1: 259a8221abca107d67c484c22cf6ed04eea6c8c0 SHA-256: cc6b61c09781af6b7ce21a3eecfaf6513274edb7bdfdcd180d657b27dc7afdb3
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, masquerading as 'Dexa scan guidelines 2017'. This is further supported by heuristics indicating a malicious redirector and a link farm. The document body, though heavily obfuscated, contains the visible lure text and the malicious URL. The primary attack pattern involves tricking the user into visiting a malicious site.

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.club/wix?keyword=dexa+scan+guidelines+2017
    • https://cdn.shopify.com/s/files/1/0466/8630/6468/files/pufobubumemejuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/9554/6273/files/zalasov.pdf
    • https://cdn.shopify.com/s/files/1/0433/1857/5262/files/34942922246.pdf
    • https://cdn.shopify.com/s/files/1/0464/9638/3128/files/jaxoxisosefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/24078203048.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/juweridabuzurekepiboxuxo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/que_gases_forman_la_atmosfera_primitiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/understanding_clinical_trials.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22700630349.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/57819432867.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/paraphrase_sentence_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/37672904533.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_off0000e938.bin
9af48f73bf13d9a182b24c83eaf78679be13f0212eaa222bea5f1d7a226b93d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 5484 bytes
font_01_sfnt_off0000fc0b.bin
80d1292689bf543ce2d19d364bbb6fbc6ffb05d2ba978e5c354ca5875cc0ce1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 14732 bytes

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