Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70d21f525df5b0d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 12:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0ec85e5d32a37c5e6179aa1c4f05003 SHA-1: d7e6ea166951bec8ae7d26de1b36f8b037fdfbad SHA-256: e70d21f525df5b0d904b4132f84835792120b4eec23df8eca5afaa85e705665e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as 'child care planning guidelines nsw'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to potentially untrusted PDF files, suggesting a link farm for SEO manipulation or malware distribution.

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/pify?keyword=child+care+planning+guidelines+nsw
    • http://gixux.jck9services.co.uk/uploads/1/3/2/7/132740669/b50ed429e0ad8.pdf
    • http://files.kimberlygottier.com/uploads/1/3/0/8/130814342/05ab52ef9e37ae.pdf
    • http://zusesu.image1st.org/uploads/1/3/1/3/131382406/fef050bbcf.pdf
    • http://files.yoursosweetamericandi.co.uk/uploads/1/3/0/7/130739924/lavezoguro.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/pipalelopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/briggs_and_stratton_500_series_158cc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/rorapamemakivubatonojemij.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/vasesazow.pdf
    • https://cdn.shopify.com/s/files/1/0430/6835/8807/files/paxej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/pusuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/44347454984.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/auto_bill_of_sale_nc_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/tejomosafujenimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/53108257156.pdf
    • https://cdn.shopify.com/s/files/1/0429/7831/2355/files/44488800982.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_off00006805.bin
4166208ca1a4c4c76295964f4fb8b5b575c60243308a8cf25b722f7864939e9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6805 5332 bytes
font_01_sfnt_off00007a26.bin
d907275b18ab120b8bcc2a4d1a79d68fd0565b075301c45c0026127943885df3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A26 9792 bytes