Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71b6eafcfea8eb4…

MALICIOUS

PDF

35.3 KB Created: 2020-09-06 23:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4414ac72ca48edfbabb4db49b9e7b521 SHA-1: 14d2466a85237d80d0d3f88258f2d581ba04afb0 SHA-256: d71b6eafcfea8eb4dda0f3fd14b98391c41b63b2f831098323985c77edf1da46
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure to a fake search result, likely to lead users to a phishing or malware download page. The ML classifier also strongly flagged this PDF as malicious.

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.link/pify?keyword=laminate+sheets+for+sale+adelaide In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/938c70_b4ae75530e4d4f18aa94f461d9f6b806.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e7897_ccafd5e5084944b590ce0a77aaf300b5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_4c93b7ba48e74cb68f10ac75e77e983d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/837d34_0a38329e57514da29c985488aecd87ae.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/23196394040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3490/0642/files/ribagibapunotow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8955/8680/files/puwazadororuxukolimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/vilesexuwoxevif.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c068f8_f83db5758c81433693087a5d29014018.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bf0735_bdd51520042b4251928477cba28f3f7a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d089b_72a9c606e72a46ad948abbb16ff5f4b8.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6D 5088 bytes
SHA-256: d739658995987ba52e1bf3318f7d1848d8bf2d7a2d70207f4ea16fb9da3c96e0
font_01_sfnt_off00005c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 10528 bytes
SHA-256: 35f4b9e779293d41fedf52d3bc51a450350c868bb9df98f831e02ffade3a4faf

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