Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ff1128d57217eb…

MALICIOUS

PDF

66.9 KB Created: 2020-11-25 01:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 62b43337415ead6191d7a8484753ca13 SHA-1: 22106821fb02dadf59c6972021247cda5ffcc0c4 SHA-256: f1ff1128d57217eb38a0e503c757a74d6c60e848e90967c5d6022cb8512c0c74
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on Weebly and S3 domains, suggesting a link farm or SEO spamming tactic. The primary malicious URL identified is trafffe.ru, which is likely used to redirect users to further malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a social engineering attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=org+chart+template+excel PDF link annotation
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/5858986.pdfIn PDF document text
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/fenew.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8347111.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/duxujapif_jumepolifi_luzilarumezo_zomiduxevow.pdfIn PDF document text
    • https://vusujotogeza.weebly.com/uploads/1/3/4/6/134653296/xomijapojekuvoriju.pdfIn PDF document text
    • https://wusikizojig.weebly.com/uploads/1/3/4/8/134883510/a80cd4b0e74.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/kigulisilo_lisovenigalo_tezegikig_xavimi.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/tixedujegibex/retail_marketing_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/falebobewuf.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/abhishekam_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/korean_alphabet_chart_with_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/eal_guided_reading_resources.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/oedema_ppt_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/xipof.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/verses_for_the_dead_plot_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/homework_practice_dilations_answer_key.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_off0000cb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8B 5264 bytes
SHA-256: ba29589badffe072e5f5c6d40e2801fe316216714b2ab83f94f28b41784c5075
font_01_sfnt_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 9868 bytes
SHA-256: a81076dbb55df443032c3c0ae274120b2ea1684f8b54cfb81dceb5de81c1f508

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