Malicious PDF — malware analysis report

Static analysis result for SHA-256 5884422a3249820c…

MALICIOUS

PDF

72.9 KB Created: 2020-08-17 14:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52da64684d42e98bc0938d930e94127 SHA-1: cb55ebf7f0b4bd4d74829d2ce8afb1cbad7979b6 SHA-256: 5884422a3249820c4c5c727c9b8ce5ba67c7f6b5bc6c043851db084545b371d5
240 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 malicious redirector link pointing to 'https://ttraff.com/pify?keyword=2010+texas+franchise+tax+report+forms'. The document body, though heavily obfuscated, contains text related to tax forms and the malicious URL, suggesting a lure for phishing or malware delivery. The presence of a PDF link farm and embedded script further indicates malicious intent.

Heuristics 7

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=2010+texas+franchise+tax+report+forms
    • http://files.weavingswellness.org/uploads/1/3/2/6/132683001/meveraga.pdf
    • http://files.madisonbisonband.com/uploads/1/3/1/4/131437552/7035600.pdf
    • http://files.resolveperformance.org/uploads/1/3/1/6/131606984/6809706.pdf
    • http://files.windowsofatlanta.com/uploads/1/3/1/4/131407709/sofekasutaz-vazusotejujeso.pdf
    • http://files.wisebloodbooks.com/uploads/1/3/1/4/131454262/tewumererovebip-rakijizuziris.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/building_material_list_for_a_house.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/54661880117.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/proform_zt6_treadmill_review.pdf
    • https://cdn.shopify.com/s/files/1/0436/3816/1561/files/frontline_magazine_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/9101/6347/files/35808187612.pdf
    • https://cdn.shopify.com/s/files/1/0435/8186/6143/files/frp_bypass_apk_huawei_p9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/siximokixalu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/47373026399.pdf
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/import_module_sqlps_in_powershell.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/nepopaxuze.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000b815.bin
569602942d3102e9463a2b4010b73d582435dabfdf63bce9bc3f8f4756c28602		 pdf-embedded-script PDF decompressed stream script payload at offset 0xB815 74658 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
font_00_sfnt_off0000d15f.bin
909c41900addc2cfe0b04f7e21c70aa7d0cf3e0493e11aeaa75506e7b438d36d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 5308 bytes
font_01_sfnt_off0000e32e.bin
849845484735a43243c89752348510e06c5784986a06f038ed2874b73cd89c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 10872 bytes
font_02_sfnt_off0001082b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 4324 bytes

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