Malicious PDF — malware analysis report

Static analysis result for SHA-256 4add89d1a5aab120…

MALICIOUS

PDF

49.4 KB Created: 2020-08-30 06:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18c53a730d74f414d59be19abef0a9a8 SHA-1: 467b90cd2dcdb393676b88af9de4f18670317113 SHA-256: 4add89d1a5aab12060cd88a70c0ef8e2d84127a5490a16e8fba8d8198594528f
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. The document body text, though heavily obfuscated, includes the phrase 'mr perfect arya 2 mp3 download' and the malicious URL, suggesting a lure for potentially unwanted content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the redirection to known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=mr+perfect+arya+2+mp3+download
    • https://static.usrfiles.com/ugd/0047a4_06bb618b39c2421aa7646e81616bafac.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d69e7d67fab432a97d0fad4414a40cc.pdf
    • https://static.usrfiles.com/ugd/eaf48f_a6bd2b16f87a4c359efc78e377a0d9aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d2de1530d9a40f7a8d9d9c9c6652491.pdf
    • https://cdn.shopify.com/s/files/1/0434/3824/3996/files/libro_los_12_economistas_mas_importantes_de_la_historia.pdf
    • https://cdn.shopify.com/s/files/1/0430/1907/5737/files/2311462797.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/cours_sur_les_neurones.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/56675453190.pdf
    • https://cdn.shopify.com/s/files/1/0440/4409/1557/files/7648100709.pdf
    • https://cdn.shopify.com/s/files/1/0462/8132/6752/files/zoxesekosupetetudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/stock_market_basics_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/topuzivamipabagezogasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/reduce_file_size_online_to_1mb.pdf
    • https://static.usrfiles.com/ugd/ce5d00_11fb35a458d946fca77e6b50ec2c11d3.pdf
    • https://static.usrfiles.com/ugd/4dd980_019ac44667e04e608ae4f0adc1d1ad47.pdf
    • https://static.usrfiles.com/ugd/a86d68_5225744c600d44bf8033f4adf95f915b.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
font_00_sfnt_off000056f8.bin
d9dff4257c5c8b98f1d5c44b2f606a357e30a66d2387e227919ec423d7ee074f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F8 5620 bytes
font_01_sfnt_off00006a1b.bin
1d8d87adac0cfcab2a48895dd9e4abc52e90b14e7d3282908892b3d386e13e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1B 15228 bytes
font_02_sfnt_off000098c0.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98C0 18776 bytes

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