Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6dc9b2a523a4468…

MALICIOUS

PDF

41.8 KB Created: 2020-09-25 12:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cebebd22387eacfa92c7498954abf260 SHA-1: f208f95d2a1c3f4cf82a62ec6a030bd8668da8cc SHA-256: e6dc9b2a523a4468f01f9634be66b51cf9f1a56397b5e10f05f43fdb9841fb1c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

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=mother+tongue+reading+questions In PDF document text
    • http://zotexug.holyplacemexico.com/uploads/1/3/1/4/131406695/raxon.pdfIn PDF document text
    • http://pijuv.thecoolwinds.com/uploads/1/3/1/4/131407164/f2e075d258a5d.pdfIn PDF document text
    • http://paxojufi.zicklinfaa.com/uploads/1/3/0/7/130775162/munonup_nugiravukode.pdfIn PDF document text
    • http://files.studio-maru.co.uk/uploads/1/3/2/6/132681513/zunosipowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8223/9137/files/97993059946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/nerapofubutefizoronofebed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/32227440542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5636/4709/files/fadopunopiwiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3691/7151/files/61648863577.pdfIn PDF document text
    • https://b8215f85-422a-493f-a354-bb0d3aaa2594.filesusr.com/ugd/bc84a3_0d3b58a4dc81439d95f844e5b658acc7.pdf?index=trueIn PDF document text
    • https://59b29e6f-ddf7-4dcd-97af-662fdf52df0d.filesusr.com/ugd/f5bc2a_dd6c0c2d56394dba9eb64f95e5193567.pdf?index=trueIn PDF document text
    • https://86dc5ab9-395b-4176-be29-e78354b61b7b.filesusr.com/ugd/b916f4_fa7c4d1f45b94ef8abb37db32d77412a.pdf?index=trueIn PDF document text
    • https://299b6cb5-45ef-4046-a53a-1cb348a30efe.filesusr.com/ugd/ed1d2e_2b4e3bb7fec24b318473654abc0ba620.pdf?index=trueIn 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_off000066b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B6 5184 bytes
SHA-256: 0fd568833f8dadfc3f4e3d21f146cb3970dc11837b23ccbaba02069256bbe57f
font_01_sfnt_off00007854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7854 9976 bytes
SHA-256: c0cee9d17abc9f5ee52e8a557748aad6a947643fee871032da0d35763392db47

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