Malicious PDF — malware analysis report

Static analysis result for SHA-256 27516e43eb8da0f4…

MALICIOUS

PDF

48.8 KB Created: 2020-10-24 19:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7c55f22fec09885f723aecbfadde6018 SHA-1: 1e01d668c8a0f77dab65e32ebc4cd2f5bd2a3390 SHA-256: 27516e43eb8da0f4515c8b7ffeb4fc2ea729a646cb764969a6a155f0bb50c2b5
94 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=expandable+recyclerview+android+code', suggesting a phishing or redirection attempt. The presence of embedded URLs and the malicious redirector link strongly indicate a malicious intent, likely to lead the user to a compromised 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://ttraff.club/pify?keyword=expandable+recyclerview+android+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f8cb6cb2d88d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f914f28e63d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f935c416c09d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f9206b8600e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5f8fc67477d6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f9069b88fe95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8efd62df632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f91f7dde94b9.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/leguvefu/ncert_biology_class_11_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/7604756201.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/nipomesalozukufoxogib.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/cassia_occidentalis_medicinal_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/84365287946.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/carboxylic_acid_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/edit_pages_order.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/ejemplo_de_acta_constitutiva_mercantil.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/18679905985.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/97795128582.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/cassandra_clare_mortal_instruments.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/86596798745.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/76293210357.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/bomulumin.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/amniotomy_for_shortening_spontaneous_labour.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/nx_10_assembly_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7261 5308 bytes
SHA-256: 40c71320a50c910409f8cc474a0fd8bc9721c766f66eedaa8530b133742189ed
font_01_sfnt_off0000848f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848F 3120 bytes
SHA-256: 2d1c02d7faeb7dad5af5d103f135926a0d4fd4e69f3a7da8959d46cf8e88466d
font_02_sfnt_off00009112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9112 10416 bytes
SHA-256: fbc29aa079b32352d38bf45f447a76559f9309ddc98da5a44e4b2728850864f5

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