Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9ef3b80a4b57e5…

MALICIOUS

PDF

40.0 KB Created: 2020-07-09 23:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c48140bd13738b942094fb01e91723d SHA-1: 4960a1bbd666e1c4927211e1d1834de60d26920e SHA-256: aa9ef3b80a4b57e50c1ea021ee7cf48db8a23f9c41c665523bb66c0a1bbd2362
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.cc/wb?keyword=solids%20liquids%20and%20gas%20worksheet', is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure through a link farm, likely for phishing or malware distribution.

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/wb?keyword=solids%20liquids%20and%20gas%20worksheet
    • http://files.fabiochef.com/uploads/1/3/1/8/131871622/zulelajojime_nutun.pdf
    • http://files.sheilabalzer.com/uploads/1/3/2/7/132710575/kososameregiwi.pdf
    • http://files.kathrynemyoung.com/uploads/1/3/1/0/131071076/porewuvofadaxa.pdf
    • http://files.carriedolan.com/uploads/1/3/0/7/130776864/9017134.pdf
    • http://files.mobilecarandrvdetail.com/uploads/1/3/1/3/131379223/wawusoneri.pdf
    • http://files.grettawilson.com/uploads/1/3/1/4/131437351/5306487.pdf
    • http://files.maxiandolikessler.com/uploads/1/3/2/6/132683289/9094524.pdf
    • http://files.studioschmidtdesigns.com/uploads/1/3/0/8/130814868/devazofupopokako.pdf
    • http://files.summerbeez.com/uploads/1/3/0/7/130775138/jososoxukifij-mofalirevijubum.pdf
    • http://files.military2millionaires.com/uploads/1/3/1/8/131872273/gitufajerifinu.pdf
    • https://vorelav760549551.files.wordpress.com/2020/07/nunufudabo.pdf
    • https://wufuwodela.files.wordpress.com/2020/07/totekopozugifukupupoj.pdf
    • https://vavaxuxaber.files.wordpress.com/2020/07/35335345155.pdf
    • https://samebis.files.wordpress.com/2020/07/20093865453.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.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_off00005ee1.bin
0cdc87ee425fa129e0d65d747e321e3e3f04b20fb6c1459f64482d0aec5b3d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE1 5352 bytes
font_01_sfnt_off00007106.bin
f8f3690ab95c75d2075580597fd4b9f879746f4ff389aaf49772a339e6dc9099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 10088 bytes

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