Malicious PDF — malware analysis report

Static analysis result for SHA-256 5784387a67e8a4ba…

MALICIOUS

PDF

44.5 KB Created: 2020-10-30 20:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9658629ecd6b8d9165b274821fe5f4e6 SHA-1: 3728d53b1ff2c9d90490fd8ce1545e27bac4d6a0 SHA-256: 5784387a67e8a4ba7b177ed8fe5d0998aea9a2c91cf31c3dcc97d41d51d569cd
154 Risk Score

Malware Insights

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

The PDF document contains a direct link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body itself contains the text 'you have to fucking eat' and the malicious URL, suggesting a social engineering lure. The presence of numerous other PDF links, many pointing to benign-looking files, suggests a link farm or SEO poisoning tactic to obscure the malicious destination.

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.me/123?keyword=you+have+to+fucking+eat In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f9151a8e7471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f8c525225bdf.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/lefalosupu_dujiseduta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/815ec900-0e0b-41d4-983a-1cdfaac0d7c8/whatsapp_apk_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3055/6053/files/flash_video_downloader_android_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5213/6117/files/goyle_harry_potter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6676/4695/files/famufovusuputuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1106a2a3-084f-4b15-bb11-87ffe47c2380/bukavuzusekalowibina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4002cc50-4dd1-4f26-9b07-604e0ba0b447/bekanise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9475e072-98a4-48c9-9537-1143072084a1/jivekizonitajajukenekuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e626d40-b658-4252-b272-344fa5d39cd8/tatopoganidivamino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8605b16d-0855-4c23-ad70-dc876accf834/all_amendments_indian_constitution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83cc067a-021f-4357-b9f3-fa3e22e6c818/12293824795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ef061d-8b76-4016-95cb-f05a7fdaec48/35012140419.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_off00006ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE2 4920 bytes
SHA-256: 83f5f46b500756f8eed72ed0347494c8555694f3ff7e430352f372df18f18e54
font_01_sfnt_off00007db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB4 12056 bytes
SHA-256: 719c17e43dbe63a025675b6734c1c2c8b07e0098eff548e8d85677d1ce051fd5

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