Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcd76224111c98d…

MALICIOUS

PDF

47.0 KB Created: 2020-08-05 03:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e15788de6e4435fe589278c41326229 SHA-1: 11c1b35114f846e027fb2a1aab0b25413bb7a10d SHA-256: 9dcd76224111c98d925992e38107f83c1c96cd0b31664d29a3039b9504666911
220 Risk Score

Malware Insights

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

The PDF contains an embedded script payload and links to a known malicious redirector. The script is likely responsible for initiating the redirection to the malicious URL, which is designed to lure the user into a phishing or malware download. The presence of 'automating administration with windows powershell pdf' in the URL suggests a potential pretext for the attack.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=10961c+automating+administration+with+windows+powershell+pdf
    • http://files.monarchgard.com/uploads/1/3/2/8/132814942/4318787.pdf
    • http://files.windowsofatlanta.com/uploads/1/3/1/4/131407655/62846ed44b43afa.pdf
    • http://files.organhaus.com/uploads/1/3/1/8/131871734/rowevozetim-nasasox-fanimivo.pdf
    • http://files.daytonheartfulness.org/uploads/1/3/1/4/131411539/e5fb279c0f5735.pdf
    • http://files.bikesandbuns.us/uploads/1/3/1/8/131856270/nezexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/the_believer_s_authority_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61053474184.pdf
    • https://cdn.shopify.com/s/files/1/0434/8067/8553/files/9508847262.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/setajojekakal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/lopugapevatiwesajapego.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/8681393927.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/alt_code_star.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/mamet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/heat_index_formula.pdf
    • https://cdn.shopify.com/s/files/1/0432/4379/8683/files/bosch_automotive_handbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70998441087.pdf
    • https://cdn.shopify.com/s/files/1/0436/7322/3321/files/52460214544.pdf
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/25183895972.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_0000b672.bin
36f628ce1f477f3e39f54923dc2e4074a72411aa7eac633b5f83aa5e230fadca		 pdf-embedded-script PDF raw stream script payload at offset 0xB672 1675 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 5 shell/COM execution token(s).
font_00_sfnt_off00007458.bin
d76e33496c70ed0159cfa03baa05128f9cd08ed11f1db71e5e434cf32946f6fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7458 6068 bytes
font_01_sfnt_off000088e5.bin
c8ee749aa54c79d93a13013077f61c71d1f15a35098d40116ff8b8dfb3f34986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E5 10456 bytes

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