Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9ce417307c7ace…

MALICIOUS

PDF

62.0 KB Created: 2020-10-09 01:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fdea7d57d39c8314bfe991d36931c174 SHA-1: d5261f927f7e79dd749510d4b856b7baef735318 SHA-256: ed9ce417307c7acef0f76a987866215485eb60839c0b160ff2f091374b20ec1c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains a URL that appears to be part of the link farm, suggesting an attempt to manipulate search engine results or lure users to 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://ggtraff.ru/pify?keyword=dnd+stat+array+5e In PDF document text
    • http://noforoxi.wholesalingoutofthebox.com/uploads/1/3/1/3/131379326/gunegim-zutim-mulubituxek-zafifiti.pdfIn PDF document text
    • http://waganoj.annasounds.com/uploads/1/3/0/7/130738554/gojegisesurev-pabusam-sovadugitasi-vozov.pdfIn PDF document text
    • http://regidur.ptpickleball.com/uploads/1/3/0/9/130969744/girudizefu-dipadapeduze-zivoxodina-kupawegugiz.pdfIn PDF document text
    • http://files.affirmationsandinnovations.com/uploads/1/3/1/8/131871912/0866d71c8.pdfIn PDF document text
    • http://files.thevirginiacotillion.com/uploads/1/3/1/3/131383720/955773.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/1/0266/8557/1260/files/zonepigovevupinunufekoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6648/5655/files/lajugapebujije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/lasubibowavofugalosuzamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3357/5075/files/popugawularenojijupokas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9020/9685/files/nonawuxorelunun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6051/0376/files/951118537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/fapujijofosogitezesimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2986/2816/files/lusaligolatetusiwag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/design_a_safety_playground_worksheets_for_second_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/line_rangers_evolve_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9091/2429/files/zubifonesifurubibudabobow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/sifikexidino.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_off0000b640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB640 5012 bytes
SHA-256: ee2cf3566aee0f87e3a85e71af910f6be5162b5b2582320efa58527ca961dd7a
font_01_sfnt_off0000c76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76E 10388 bytes
SHA-256: 4d848d7547c54796e9960f8401102c774f9f360aee9da4e2992cc840d99617d4

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