Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f93578c271c3455…

MALICIOUS

PDF

42.7 KB Created: 2020-10-31 17:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 62e6767959c4a93e6cb657c3ef5e745d SHA-1: 76d68d92d9b5bd77cb20b97af4e00352b043d481 SHA-256: 4f93578c271c345507edce24a475b05ac182e72f9b620e33d6403b4979b0b4c8
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.club'. The document body, though heavily obfuscated, also contains this URL. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be tricking the user into clicking the embedded link, which is a common phishing or malware delivery technique.

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/123?keyword=manual+box+stapler In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f88c6b2903af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f8fca1d684cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f9b8895ce2c1.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/rozebofukixus/usg_all_purpose_joint_compound.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/vomuzexuwezugikuboza.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/diving_games_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9418/9251/files/wabawidoxumuvasegofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219cdc8d-ace5-4b65-b1d4-3d8b21d14b94/54311390049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7190/4673/files/tobunefa.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/useful_synonyms_for_ielts_reading.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/general_mental_ability_reasoning.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/37876165180.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/chani_project_transcript.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_off0000671b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671B 5024 bytes
SHA-256: 4d207e776334f94723ebc64666cea0400dde05e47d8cb59b3942e982090298ae
font_01_sfnt_off0000784a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784A 11124 bytes
SHA-256: 1b0d4a5d833e0b08297b900991fe127fd43f594aef8716de54d9c88153828e15