Malicious PDF — malware analysis report

Static analysis result for SHA-256 d021ec81fffa2713…

MALICIOUS

PDF

34.5 KB Created: 2020-11-06 20:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e68e5d9f05efdf7e5b4268f334db3b SHA-1: dd0f026724bca6d67565aace527a4390776634bc SHA-256: d021ec81fffa2713cdc483d6025ae0384240dc6d97462972f5da60c1cf44122d
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is disguised as a search result. The ML classifier also strongly indicated maliciousness. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/123?keyword=walmart+waikiki+honolulu
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f970ca90260f.pdf
    • https://cdn-cms.f-static.net/uploads/4423452/normal_5fa3423b43129.pdf
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f8d3d7d79355.pdf
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f94e6257d23d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b48ea7c0-1035-40f0-a83b-b6ec9ba84c41/user_manual_for_kenmore_elite_washer.pdf
    • https://xanafegeze.files.wordpress.com/2020/11/49035677209.pdf
    • https://segokaguwun.files.wordpress.com/2020/11/84517655789.pdf
    • https://s3.amazonaws.com/kubafezin/fesim.pdf
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdf
    • https://uploads.strikinglycdn.com/files/541144bd-76a1-4163-8354-6645c3acebe1/goselifaf.pdf
    • https://s3.amazonaws.com/fulosobezur/31956284269.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000490a.bin
3d67f03b5611287f31e615b42ec8b75e4ec1895d43d6f9e504ff8413f47995ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x490A 4916 bytes
font_01_sfnt_off000059ab.bin
acba30ee73c352368781261adfc47444c291e3fbb1eabacb7f9fe5f15e30f5e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AB 10488 bytes

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