Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ca0d1f2762ee69…

MALICIOUS

PDF

62.9 KB Created: 2020-11-03 21:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2ce5d7dc5163d21144494dbbf7240cf7 SHA-1: e901791fb359ac7545e1196d9b194bec27b47feb SHA-256: 77ca0d1f2762ee6909d3a8b20e133e61b2f7737dceaf9a6490b69851ce77d006
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is a strong indicator of malicious intent. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, suggesting an attempt to distribute malware or conduct phishing. The document body, though partially corrupted, contains the same URL as the malicious redirector, reinforcing the attack vector.

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/123?keyword=segundo+viaje+misionero+de+pablo+resumen In PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/3470289.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/vapav.pdfIn PDF document text
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/xatexuzikusi.pdfIn PDF document text
    • https://beritugemob.weebly.com/uploads/1/3/4/3/134332724/pobapunabopurabas.pdfIn PDF document text
    • https://poroxokinawutaj.weebly.com/uploads/1/3/4/5/134507376/xaguvuzegab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nilafafakem/crabs_adjust_humidity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8b8c8e-6b6a-4544-937a-b8bf0ce2c40b/tumaxazakokibalonedeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84681d9-fca2-494f-844a-14474680dd53/cube_escape_case_23_chapter_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4500f651-545b-4421-b861-cd08d6c27d63/53838595400.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/duxuviniwofewowujegil.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/finance_interview_questions_and_answers_for_mba_freshers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d140d99-3acf-490b-ad4b-6094ea030c44/fuxinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2bb1de-5a48-4aea-8b2f-4236f9422b69/salon_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/tv_guide_erie_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203fb021-f466-4dcd-9c10-8e54590810f0/9651964551.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_off0000a7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E5 5460 bytes
SHA-256: 4912e8b5ff51af37392d8b463e9b416801c07e7942124aefe48b1b2882846ef5
font_01_sfnt_off0000ba51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA51 11148 bytes
SHA-256: 81028ad84b89e26025edab68b1bd9dd85ee6c19ae6946585c47cb612f3d44c4d
font_02_sfnt_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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