Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04c5fa50467cb73…

MALICIOUS

PDF

42.3 KB Created: 2020-11-01 17:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c1289fb6e6b79f9bef00103c2d71fd51 SHA-1: d9da887e630000d7f583c2958cbf4cfc0d062925 SHA-256: f04c5fa50467cb73557be1966b4d615dbf19171910a6b2de1684fd855e5f1f42
110 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector, specifically linking to 'ttraff.cc'. The document body includes urgency and call-to-action phrases, reinforcing the lure. The primary IOC is the malicious redirector URL, which is likely used to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=evergreen+public+schools+mt In PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/bobovajof-gemigomeneruro.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/1/0482/9616/5534/files/95292872261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3499/1528/files/fundamentals_of_power_semiconductor_devices_baliga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e5ae94-80d1-48f0-bcd6-9058a08b4797/bawomixanosujuvavetavirep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9177/0526/files/57986451819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3120/6301/files/antivirus_free_download_for_android_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6258/2180/files/jalozerim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/blitz_judo_suit_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3357/4555/files/tobiseketufozamagurofumad.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_off00006357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6357 5296 bytes
SHA-256: f3a258f9801df87c51cc87bf31739799bd2c87c2f73592784cf58de15bf2ff7f
font_01_sfnt_off0000753f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 12392 bytes
SHA-256: 47cebc46f6a84cc4ac3838bde1e90a98c663d278b264c170acad047d89df5422

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