Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbee47e33206512…

MALICIOUS

PDF

43.6 KB Created: 2020-08-21 08:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeeabacc45192367add95263ce2b585a SHA-1: eb3e52efa48d678fd115c52ebe22f9bd55429bea SHA-256: cdbee47e33206512424fa9b04e1ab3d3d52f1f0839a3757f48d970598458611c
130 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains text related to 'calculus handwritten notes pdf' and includes the malicious redirector URL. This suggests a social engineering lure to trick users into downloading potentially malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=calculus+handwritten+notes+pdf
    • http://files.certosadipadula.org/uploads/1/3/2/7/132710621/5737571.pdf
    • http://tasugos.jakesmeester.com/uploads/1/3/0/9/130968996/29691d85dc65.pdf
    • http://files.danburyneighbourhoodplan.com/uploads/1/3/1/6/131607522/fivujamomuvaxesiwik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/book_of_thoth.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/45425869280.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/bonos_de_carbono.pdf
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/remove_malicious_code_from.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/mumejudedarisasexaxojax.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/suboxaxogune.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/48686882240.pdf
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/vatavetiwavenin.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/39829396984.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_off00005fe5.bin
ac621061e8b3a35fa00902e72719708fb380ad9d44e586b018d19fd2daa9917b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 5240 bytes
font_01_sfnt_off000071b8.bin
05efdaa98824eeb018b7885a56b2df1b43edbdd8320adb702e5af9fe2a6aa1ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 15656 bytes

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