Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9dd0872973585a…

MALICIOUS

PDF

47.3 KB Created: 2020-09-16 20:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce4ea6122c861b049217d8cabb92e02c SHA-1: 6d28d0b447d8e617d58120f53323a078617149f3 SHA-256: ef9dd0872973585a1bc60bd25ec0c55e8b255c81c7474476f702577c9e7cdb5c
152 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link disguised as a download for 'Wim Hof the Way of the Iceman'. The document also includes a large number of SEO-optimized links pointing to PDF files hosted on various platforms, likely to improve search engine ranking and distribute the malicious payload. The primary malicious IOC is the redirector URL which likely leads to further stages of the attack.

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.club/wix?keyword=wim+hof+the+way+of+the+iceman+pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/wonimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1397/1861/files/podaxoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/lolegafofe.pdf
    • https://1504bf31-ad05-4fb1-a4e4-55fc58e7a4eb.filesusr.com/ugd/d8966e_bad27a781dd445738322be08e00e1e58.pdf?index=true
    • https://34cba82b-20f3-4b94-b80b-94b5b8fc1dd2.filesusr.com/ugd/01bc73_2eb7aff073d944829b0e725fd2d17fdb.pdf?index=true
    • https://13bfa6d7-f724-44d4-b207-b7c8035ef9fc.filesusr.com/ugd/3225da_db7c5de134324905a79f790217a9dda1.pdf?index=true
    • https://cd788427-3247-4a90-88d0-61ca5283313a.filesusr.com/ugd/65b209_9ae967051f6d4573a03c9fb972edd84c.pdf?index=true
    • https://8d7c7955-bdbb-452c-b91b-f4cb6f262e71.filesusr.com/ugd/3e7897_fff77ede73504571b4856bf00a96d47c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/81164111517.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1766/files/72486390197.pdf
    • https://2c4dcff6-4e16-4ae3-b6c8-b8c06be00b06.filesusr.com/ugd/370021_3d6852ce9a95415da87818a420203529.pdf?index=true
    • https://d3816aea-ae43-45a9-90ae-47ee24af39e3.filesusr.com/ugd/02ccf7_3a16427d03144169a83c02e535ff61c6.pdf?index=true
    • https://3a5afbc6-544f-421a-a235-e86492e6e442.filesusr.com/ugd/74e905_8b2b7fe82c684127ab54c9aa048422d6.pdf?index=true
    • https://7680d92c-29c3-4b5e-85ea-5cbc27b13a9c.filesusr.com/ugd/43d598_ab3a455c57ba4c9c83533a2205398b8b.pdf?index=true
    • https://f4e09a62-2c18-4152-9b13-054e6e768703.filesusr.com/ugd/668a47_c8d60a0d12014702bffc7bae6b4d2433.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://1504bf31-ad05-4fb1-a4e4-55fc58e7a4eb.filesusr.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007889.bin
8734eb1a5be38e4bcc350809db756b1e2283f649c5761b00868344c31619b5ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7889 5296 bytes
font_01_sfnt_off00008a8e.bin
f25d094b9e6ca03c147b1fa7a58be616c3561915f6507e7bb1efec9445085c69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8E 10564 bytes

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