Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd07dd39377b49ef…

MALICIOUS

PDF

36.0 KB Created: 2020-08-26 11:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b650ac3e305c2b03f27ee2c3875a2545 SHA-1: 1184c4918c1b2d42227014e83af98234e3dc383a SHA-256: cd07dd39377b49ef02086a7fa622e5a7e5a87619abe1d1a5805824c0dba89c8f
150 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to a 'Nordictrack x5i manual' and the malicious URL, suggesting a lure to a scam or phishing page. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify URLs, likely to mask the malicious redirector. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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=nordictrack+x5i+manual
    • http://files.luvmyhats.com/uploads/1/3/1/4/131437276/bawikikepu.pdf
    • http://files.lindenwoldlea.org/uploads/1/3/0/8/130813731/7047462.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/33033254244.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/benefits_of_artificial_intelligence_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/vector_brochure_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/wonderful_tonight_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/2971/5354/files/20394755304.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/57574345287.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/63714604341.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/enviar_itinerario_amadeus.pdf
    • https://cdn.shopify.com/s/files/1/0440/7564/7128/files/peramevi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/52005067631.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/wakimesineganawotaderuder.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_off00004ed9.bin
4641f8e66139d6243df2dc92c1b4db78ce27dda8eac3f78bbe5279d8519034f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED9 5132 bytes
font_01_sfnt_off00006041.bin
45e5c1b45967b76f320cc5ae1fcd697d42ce1bffd425b4c5c64b045b7c76a212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6041 10376 bytes

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