Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cacecb1afb18dcd…

MALICIOUS

PDF

41.7 KB Created: 2020-09-17 10:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a1cdbc7d47940bcc0f0d4ce0b990ee3 SHA-1: dbf0310a6c3404a8ff73a6b4701b79db7f2d7833 SHA-256: 4cacecb1afb18dcd57a3b2dcd56042a65205dddba72ec74a6d3e3cd5a2845f46
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector. The document body text and embedded URLs suggest a lure to download further content, likely malicious. The ML classifier strongly indicated maliciousness. The primary attack pattern involves a link farm designed to redirect users to potentially harmful sites.

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.link/wix?keyword=the+heart+of+mathematics+an+invitation+to+effective+thinking+4th+edition+pdf
    • http://files.eringreenauthor.co.uk/uploads/1/3/1/3/131380870/6745992.pdf
    • http://tiwaku.briankrausphotographyltd.com/uploads/1/3/0/7/130776542/5a78d7.pdf
    • http://tasenuso.mapokoresearch.com/uploads/1/3/2/6/132682787/zuzaralupe.pdf
    • http://files.nailsbytdangshop.com/uploads/1/3/2/6/132696109/ruvejudipoxopegirif.pdf
    • http://jikiwajim.supherblendz.com/uploads/1/3/2/6/132683051/3777862.pdf
    • http://files.westburnsvalleysolar.com/uploads/1/3/1/3/131380688/3281327.pdf
    • http://fopazuwer.thegardenpeople.org/uploads/1/3/2/6/132682156/vogolixetabewunebuj.pdf
    • http://files.tracydanielstherapies.co.uk/uploads/1/3/0/7/130740298/a6c38e20cd6c1a.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/wutazuduk.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/8005/files/dasovanixo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/32520618473.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/azure_cli_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9698/0136/files/479651810.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3420/files/zinaweboj.pdf
    • https://cdn.shopify.com/s/files/1/0460/7108/7268/files/zolpidem_10mg.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_off0000639c.bin
6bb6bb91655d29ffd4c3f362e24f895f53f39f460db5378322c67945429ef6d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639C 5696 bytes
font_01_sfnt_off000076e1.bin
35c81fb8b31bea37bdbecc112cd0065c1c84f9233e7d118bc2c6debaacde0410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E1 10040 bytes

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