Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1179a79f81b3889…

MALICIOUS

PDF

38.3 KB Created: 2020-09-21 15:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 007b98a586e53f1046919c8331a469a2 SHA-1: cad6027d8b2186a59dcba6974067bb259e58167b SHA-256: a1179a79f81b3889cd1544ef4641f7f88c105cceb43fc7a318f208ea0e7d9253
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Yugioh season 0 episodes online' and the authoring application, suggesting a lure to attract users to click on the malicious links. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=yugioh+season+0+episodes+online
    • http://wereb.delcondesign.com/uploads/1/3/1/4/131437987/timalepofibaso.pdf
    • http://files.elizabethfremantle.com/uploads/1/3/2/8/132815183/9829212.pdf
    • http://files.congrevelab.org/uploads/1/3/2/6/132681665/2ccf59c82.pdf
    • http://files.andymullens.com/uploads/1/3/0/7/130775171/jomajonu.pdf
    • http://xabapexon.thenighthorseman.com/uploads/1/3/2/6/132696056/6b8a44aa7da47.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0695/files/77195847438.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/tumina.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/xejuwidulubelasoruwobibob.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/gigewifibulepa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/sufubirekekokajubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/hidden_object_games_no_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0479/3365/3148/files/74305133252.pdf
    • https://b0427e8d-25ec-4c9f-b586-2f113fd9520f.filesusr.com/ugd/6cf0f5_126856e484674ad397feab49bd2fa631.pdf?index=true
    • https://0c2054a1-fc38-48f0-bcf2-61f9f89ebceb.filesusr.com/ugd/cf9ff1_4714dbf9d5b14cafbeaba314c77a52e5.pdf?index=true
    • https://11d91738-1b70-4d50-8efd-cd3cb38dad17.filesusr.com/ugd/8127dd_f775a9f8f1b746d29476fc64e7ae32f4.pdf?index=true
    • https://fbe62d28-5b61-4761-aaa4-727b8883861b.filesusr.com/ugd/efc97f_11aa155a9b2244359abdd36b72c6b7e1.pdf?index=true
    • https://c3a171ef-34b5-48d6-8a76-a4462d75de59.filesusr.com/ugd/c75f60_9b76186376e446fba2463b906059b9bc.pdf?index=true
    • 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/
    • https://c3a171ef-34b5-48d6-8a76-a4462d75de59.filesusr.com/ugd/c75

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a90.bin
68bbaad518bb71071c5cfb08577a7b40c841268f60136ca2144c15c85940f0e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A90 5032 bytes
font_01_sfnt_off00005b94.bin
d8173f78e30509327bb24c9827310aa392ab75eece5e19d09c43fb924708e8d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B94 10060 bytes
font_02_sfnt_off00007dff.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFF 4324 bytes

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