Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5862648c6c7e80…

MALICIOUS

PDF

35.4 KB Created: 2020-08-18 16:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb0d8dbee41d00d8e82f82cd9f44e92e SHA-1: e4e36579dd34d39ef69b503fb2398ba6b55480a3 SHA-256: fb5862648c6c7e800526155b1896905db483f0409d57ff50312ff05e40e7ade8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of embedded external links, indicating a link farm. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=in+between+the+sheets+remix'. The document body, though heavily obfuscated, also contains this URL and references to other PDFs hosted on Shopify, suggesting a lure or redirection mechanism. The ML classifier also strongly indicated maliciousness.

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=in+between+the+sheets+remix
    • http://wovilozed.lamassou.com/uploads/1/3/1/4/131482992/riremasapupijunap.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/woweja.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/affluence_without_abundance.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/70030873023.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9777/files/9607406536.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/dotoxije.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/31366219292.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/8015893930.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/cement_pipe_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/millermatic_252_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/47509164212.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_off00004e9a.bin
c9affff6f3f720ba183ae67798e860e891750df849ce80ff86bb12dc884acaf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9A 4920 bytes
font_01_sfnt_off00005f3a.bin
bebcb931d9b62e8d1ac9560d2d96b736dd03983e298a915bcc0bf6354a436f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3A 9988 bytes

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