Malicious PDF — malware analysis report

Static analysis result for SHA-256 287f6bc5f9696aad…

MALICIOUS

PDF

35.1 KB Created: 2020-08-20 18:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00c98133e0d98f9d31446da7d68b7d10 SHA-1: 018d5336e2387c63b0d2a8eeff75b3223fc3fb83 SHA-256: 287f6bc5f9696aad589e99e7740e9c8cd7def1dc1787bc00c233e37d64c6c16b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure related to a 'baby girl announcement card template' and embeds numerous links. One of these links, https://ttraff.com/pify?keyword=baby+girl+announcement+card+template, is identified as a malicious redirector. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=baby+girl+announcement+card+template
    • http://files.adf64.org/uploads/1/3/2/6/132695492/kusevobizati-saxogegoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/3rd_grade_fsa_math_practice.pdf
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/12713207000.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/fubigozajigadukik.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/kopavonaxowexinavusovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/blue_book_of_grammar_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/5443/0368/files/solidworks_tutorial_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0435/2291/6520/files/86143747387.pdf
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/muvunowupikabezu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/54798891698.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/189625542.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/61403788722.pdf
    • https://cdn.shopify.com/s/files/1/0433/5599/6328/files/patogenesis_anemia_defisiensi_besi.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_off00004d7d.bin
33a9989e130cabcf96504637908023323afdf39c33a3e7f5b02cadf4b0508d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D7D 5508 bytes
font_01_sfnt_off00006015.bin
a301fd8f063d3ebd06ecfb4783b5d3295ee36ded510e8d73c439d18a96c4e11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6015 9252 bytes

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