Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed91d784d5431fca…

MALICIOUS

PDF

63.4 KB Created: 2020-08-22 05:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c199f1e940fadb1f482fbe491c447268 SHA-1: 9660a81dcefc00ee53b7eb32cc5674f4fc342466 SHA-256: ed91d784d5431fcacf9150eef2c9de57681d445648e5bf1ec7ec39fa2c3460c1
220 Risk Score

Malware Insights

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

The PDF contains an embedded script payload and a critical heuristic firing for a malicious redirector link pointing to ttraff.com. The document body also contains the same URL, suggesting it's the primary lure. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may also instruct the user to execute commands, potentially involving PowerShell.

Heuristics 6

  • 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 script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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=connect+azure+information+protection+powershell
    • http://bimerazuk.ambercoveshoreexcursion.com/uploads/1/3/0/9/130969140/sazilirufasuwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/6170905616.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/gmo_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/41982172718.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/pitoriwopanetoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/54183247138.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/pibonaneretutij.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/fadin.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/55804898156.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/93169470799.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3535/files/dejar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000f81b.bin
d90faef752eb55896d615996988ce6ec672bd4513245f6fb630200fd139513db		 pdf-embedded-script PDF raw stream script payload at offset 0xF81B 1647 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 5 shell/COM execution token(s).
font_00_sfnt_off0000b292.bin
169c8e3ccdba35a898a8801eba5f7bdec72b2294663407b8c9330e081a4f6bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB292 5304 bytes
font_01_sfnt_off0000c488.bin
e0d81d3b2d6a9b35b3eb5c2d5b6c39c28898848cf12d01c36861fa8d86694b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC488 13676 bytes

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