Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e00e1f03036063…

MALICIOUS

PDF

40.4 KB Created: 2020-10-26 12:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 55bf484338255dc3f6299991d4c531d8 SHA-1: 1bac9e565fa804715df4c518f16d5e2f6a8a33c6 SHA-256: 35e00e1f030360639ba3e5bfd35001f2e61941c67b040c256e22cea80d0895f2
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that is also flagged as a malicious redirector. This suggests the primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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.cc/pify?keyword=latitude+and+longitude+worksheet+answer+key+pdf In PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/465ea4c9d4.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/wegowozuxujo.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/5353655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f93556243140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f961e9797f88.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/xuxifuzituwu/active_and_passive_voice_multiple_choice_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/folotibi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/bridge_to_terabithia_chapter_3.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/jpg_to_word_converter_online_free_i_love.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/zaref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6961363-bbc6-4250-90f3-b7db69412b9c/fudisolof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a017314a-10c0-4136-807e-b4497004269a/piano_hand_independence_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da646dcc-4451-43f7-b95a-5c4f588134fc/44538918955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0899441d-0f64-4a01-9ce3-b029a85ccbff/35363626919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e91a52-5a33-46ef-b3b6-d303b281cad6/47162034731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb79b21-a47e-41d7-8366-21fc5df7e8f9/16396286677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3727/6825/files/7498135141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/dr_gary_veterinarian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/td_assurance_auto_contact.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_off00005d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2F 5504 bytes
SHA-256: aa338b8b408104f23c1446f52e94f0ef315ca77ecb4d46512c6adcdad60912cc
font_01_sfnt_off00006ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFE 11064 bytes
SHA-256: 47f8ac4378c2f387c33248049574bfb26b1f46d9fca0ad2cd22e8e6d40a0191b

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