Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc6b6b614c6a6dd…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 08:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65e1e8853006a36820cf4aafe59f9083 SHA-1: a8303a443d9bb6e28a16a13149a51c73ab28abae SHA-256: 2dc6b6b614c6a6ddbb601c1ebfb43c01c4c9ac5d8283581ed3dd196807249bc1
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Anorexia bulimia y vigorexia pdf' and the malicious URL, suggesting a lure to a malicious site disguised as a relevant PDF. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the presence of a link to malicious infrastructure.

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=anorexia+bulimia+y+vigorexia+pdf
    • http://files.lizellabella.com/uploads/1/3/1/4/131437147/9d1707.pdf
    • http://files.brisbanedanceworkshop.org/uploads/1/3/0/8/130813923/65b02.pdf
    • http://files.reynoldseducationassociation.org/uploads/1/3/1/4/131483148/kusunopu.pdf
    • http://files.communityoff-road.com/uploads/1/3/2/3/132302928/2896198.pdf
    • http://files.tynycoedsurgery.com/uploads/1/3/0/7/130739996/d3a7f5af9.pdf
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/munogixetaregimiziloro.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/78022928311.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/93460284799.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/41994490468.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/sobujofipajubetolenup.pdf
    • https://cdn.shopify.com/s/files/1/0450/2568/9758/files/ascending_and_descending_order_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/29067263206.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/dezisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/jipuwerosudexewuxazivupu.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_off00005ef2.bin
646ecce99b427552cbf60afa9009bcb9836bff4fc4805b29e07976db65652485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF2 5544 bytes
font_01_sfnt_off000071ba.bin
75e41008dacc4e94e01adf043e213f3b35f531d9f582e785d3cfce9845658020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BA 10428 bytes

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