Malicious PDF — malware analysis report

Static analysis result for SHA-256 994ac4755f138824…

MALICIOUS

PDF

36.0 KB Created: 2020-08-05 14:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ff062bd52b8cd6a23b2c64888e779a SHA-1: d4530550fee32b94049fd03143c4753ee4ecabfa SHA-256: 994ac4755f138824dfcfac404545e9a5dd55db084b8b821bb5b360abf94372f3
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'punekar sc st act book pdf' and a URL pointing to a redirector. This suggests the document's primary purpose is to trick users into visiting the malicious URL, likely leading to further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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 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=punekar+sc+st+act+book+pdf
    • http://files.marcusgeorge.com/uploads/1/3/1/3/131380717/68d557b01fd.pdf
    • http://files.anastasiaabrahim.com/uploads/1/3/1/0/131070737/eabeb0.pdf
    • http://files.filmstillphotography.com/uploads/1/3/1/6/131606262/wawirabid_wokodavofod.pdf
    • http://files.djannalog.com/uploads/1/3/2/8/132814342/9755804.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/lakamepunobob.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/50710348023.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/lajuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1040/files/96881376624.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/xudil.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/basilsila_ta_azal.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/91407736673.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/42272672094.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/blank_certificate_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/fiwiketanabujumarulax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/1777076264.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/tawazejeporinixerogir.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5581/files/59517392325.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_off00004f42.bin
37ce6a2c317510c8618ad1b69e61145f8b5fe87b08a96c87e9c38a6b493c0c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F42 5320 bytes
font_01_sfnt_off00006166.bin
3dae202da8f22c6f6477450d72c059a3748641cf95750e37b014b1555269bac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 9864 bytes

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