Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5907c377b4d380…

MALICIOUS

PDF

40.5 KB Created: 2020-08-27 23:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7887d4fb1bc33e7731507a0cea7c043 SHA-1: feb026799e377cc0917a7ad0c8ca9e77a32bc9ac SHA-256: 3f5907c377b4d380069269e46c85e51ec1f01ea0789084e3de910f29db5dc454
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. The primary malicious URL, 'https://ttraff.com/pify?keyword=pokemon+x+hacks', is a known redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking PDFs hosted on Shopify, suggesting a lure or redirection mechanism. The ML 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.com/pify?keyword=pokemon+x+hacks
    • http://files.mthja.com/uploads/1/3/0/8/130814960/41440d.pdf
    • http://fowezew.stockmi.com/uploads/1/3/0/7/130739723/9952602.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/tonob.pdf
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/ranogugeg.pdf
    • https://cdn.shopify.com/s/files/1/0447/8684/3799/files/how_to_delete_blank_page_in_file_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/6918/3902/files/initiation_astronomie.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/pumiwaxaloxodozawafuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/97483291206.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/cleaning_company_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/selalumodoseboti.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/analyzing_a_poem_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/98836687.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/54064488579.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/allah_names_and_benefits.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_off00006183.bin
b763abf82643f448703280bc5e6547b9462aa0efe70c8af45cddb4b9af1bd18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5044 bytes
font_01_sfnt_off00007284.bin
f382250c1fcac2d6710695a20ba23014410743b3d2c9a24b51e0c0a856439ebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7284 10352 bytes

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