Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3f56008deb19a4…

MALICIOUS

PDF

47.5 KB Created: 2020-08-22 09:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b9eeb637862b789e349a2a2d90a82f5 SHA-1: f02d6d9a13caf7493bd35f016563f942621afaa4 SHA-256: cf3f56008deb19a4fde44c72ef27bbd123519927650adea6feed57c206f0bfed
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The document body, though heavily corrupted, contains the text 'What is neonatal jaundice pdf' and the malicious URL, reinforcing the lure. The primary malicious URL is https://ttraff.cc/pify?keyword=what+is+neonatal+jaundice+pdf, which likely leads to further malicious content.

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=what+is+neonatal+jaundice+pdf
    • http://files.erickjramirez.com/uploads/1/3/0/9/130969428/ruzutolukapo.pdf
    • http://xegazafes.southcallawayfootball.com/uploads/1/3/0/7/130776265/badonevagitum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2569/3845/files/ganonifopizaderonagosevuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/luguvulubij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/riwapuborosakenupegepujod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/child_behavior_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/69030551334.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/vobetafexeguz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/rabutumulob.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/adobe_reader_8_free_download_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/53007826899.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/92220350841.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4498/files/19997552936.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_off00007d1c.bin
60cf06b1d5867a487480a264f788a398f78013b8bfc02cfa5d3c8ac7b159acef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1C 5236 bytes
font_01_sfnt_off00008ef6.bin
4bcd738a9adf41efd665fca19b5071a7096893c025c0e83c97fc674923f7734f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF6 10160 bytes

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