Malicious PDF — malware analysis report

Static analysis result for SHA-256 a944c8ab1f7a159b…

MALICIOUS

PDF

42.0 KB Created: 2020-11-01 21:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5b4d0a0b72107643e98fda23f980bcc3 SHA-1: 580781b30905009d99f3488b04a720a509ebeec4 SHA-256: a944c8ab1f7a159bbef5e2538fce7f02565aa46439f343f54f8ad6a89467eb70
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://gettraff.ru/aws?keyword=terrarium+tv+download+pc` is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://gettraff.ru/aws?keyword=terrarium+tv+download+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412391/normal_5f99169e86529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f8b4c06c4e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f92a5f294635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f8ab1446caaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5f9a3df3b1fb9.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/nosepevozux/tupac_shakur_autopsy.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/bopalik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8425/0783/files/clarke_county_jail_osceola_iowa.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/8562333687.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/samirovujabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0437/7257/files/hepatitis_b_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0201/5139/files/4206080773.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/tekken_6_for_android_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7656/0059/files/saxulikalovorosujados.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2412/1495/files/tixukejerapezivo.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/mikukubepipasaboz.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_off00006716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 5140 bytes
SHA-256: 283975feab35443fea63e18112fdb9d65569a00e6c0910bf90505af69a2aa91d
font_01_sfnt_off00007890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7890 10224 bytes
SHA-256: d3107398049cdc8232131e2ceab7a78f1408b780110e935e0750d29c3acd0ea8

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