Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4ea5f3b91bb230…

MALICIOUS

PDF

39.7 KB Created: 2020-10-30 06:25:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 763fe6631249e238861f95dca6c9b6e3 SHA-1: 2bb99cdc9271a45599b7f2528860e30f552cf97b SHA-256: dc4ea5f3b91bb2306be329d0b7bf518bb5ec23c56550e17de068f8c0caa894ab
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/123?keyword=rockin+in+time+9th+edition+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

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.cc/123?keyword=rockin+in+time+9th+edition+pdf In PDF document text
    • https://zefubolinela.weebly.com/uploads/1/3/4/3/134318842/3986828.pdfIn PDF document text
    • https://mikudone.weebly.com/uploads/1/3/4/3/134370159/tizokorum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0953/9748/files/rirakudodub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac4becb-09b4-4cc1-9568-1f9948b620da/96069544646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7162/6659/files/hitachi_bread_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1656/6964/files/recovering_deleted_text_messages_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3845/6999/files/suzuki_lt80_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7793/1686/files/hyatt_place_las_vegas_pet_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/sintron_amann_girrbach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2449/7863/files/proprioception_exercises_for_ankle_sprains.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3560/2339/files/tongue_emoji_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/girejopasojifigigiv.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_off00005d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2C 5108 bytes
SHA-256: adf2e10bb1fc4e0789671a447dc042467fa00385a462a5ad940275b8b02671f7
font_01_sfnt_off00006e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 10372 bytes
SHA-256: d21554f73b6b133de3c21b70de78585582b7d8c69f8fea8fa6dbe1cbc83486f4