Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ba2424ce361734…

MALICIOUS

PDF

75.0 KB Created: 2020-11-01 22:04:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ec29decc88238a000146c21e095cb68f SHA-1: 31d8a4f86678a458fc4ccbc4030fa26d68f1d29a SHA-256: d7ba2424ce36173420547f21ac3e20178f748a1d5ff75f11d00292dfd67e5e68
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with a critical heuristic firing for redirector links to known malicious infrastructure. The primary URL, 'https://ggtraff.ru/aws?keyword=wii+iso+compressed', is flagged as malicious. This suggests the document's purpose is to lure users through these links to a site that likely hosts phishing content or malware. No scripts were extracted, but the structure and link farm indicate a malicious intent to redirect users.

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/aws?keyword=wii+iso+compressed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5f928c94480c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_5f97a67e7ab54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5f95d2bb041ba.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/4024414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8ec4a76a749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f9c161df16a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f93b363934ed.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/kejudufejirazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5f8d58617c59a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f9e8e822d591.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/zowumasofoxosubomusufo.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/wuxuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a2d19b-e12e-455f-8e64-a971d562a8c4/nimigobuvifupipolewexobu.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/71502645974.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_off0000daf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF2 4992 bytes
SHA-256: 36b19cd107c9eb9665c190b5f81766838eaab364d09612772d3548a0e43c889e
font_01_sfnt_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 16432 bytes
SHA-256: adaeb199ddbd8d4e5c3966d08a76dc1b4099c6f5eb8f1ad7a4fb079db38758f3

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