Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf43b580f6ae1d7…

MALICIOUS

PDF

50.3 KB Created: 2020-07-30 00:46:27 +03:00
MD5: fef62c60ac80c286dc87787ed4ffa155 SHA-1: fd613cf8b52cae72443907e1cb51a1b1a0b6bed9 SHA-256: 9cf43b580f6ae1d718dd85ccc6cd0c49c78a68e432a5c48ac68bab81e6ff5db7
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 links to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'automating administration with windows powershell pdf', suggesting a lure related to system administration. The presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing indicates the primary goal is to redirect the user to a malicious site, likely for further exploitation or credential theft. The embedded script further supports the malicious intent, potentially for downloading additional payloads.

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 HTML script tags. 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=10961+automating+administration+with+windows+powershell+pdf
    • http://files.wroughtbylight.com/uploads/1/3/1/4/131409309/sadebu-zonefad.pdf
    • http://files.safna.com/uploads/1/3/2/6/132680853/9128350.pdf
    • http://files.olneyartscouncil.com/uploads/1/3/2/6/132696063/ferojorexuzolim_felesatanu_xukaribukowivev.pdf
    • http://files.mellinamathclass.com/uploads/1/3/2/7/132712006/4781525.pdf
    • http://files.mellinamathclass.com/uploads/1/3/2/7/132712006/4781525
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/vitadagunulikajubane.pdf
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/wugemataxesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/50937934718.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/tugetoginojoguxubuwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/gikexatulaboxutunorapafil.pdf
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/rojevunedeme.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/lujirirubixubokogiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81599599528.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/dokepekisuzipijapifilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/kumuvixibibiwof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/jimik.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/83334097763.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/66757281709.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_0000c3be.bin
775369449a90efbbbd4effcefae58bb63cde89daaa7c9ca16d239cb4b85659a4		 pdf-embedded-script PDF raw stream script payload at offset 0xC3BE 1681 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 shell/COM execution token(s).
font_00_sfnt_off0000851a.bin
872aa73ba9c533751eaa0df9836dc31d0bc6f0de4d98284cf548f54191683d68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x851A 5836 bytes
font_01_sfnt_off000098ce.bin
0aa0865a0c74539461c4035a63586aa55a19f7f35a5a8a2f7c0a475674dcbc4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98CE 10164 bytes

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