Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eca4ae244d5dc46…

MALICIOUS

PDF

45.4 KB Created: 2020-11-01 18:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7cba543bc6550219473f28420c6b4a74 SHA-1: b03c19346d33043d0ec59737cebebdd427ff8520 SHA-256: 9eca4ae244d5dc46d806978c5ada0d9e0647b34bb502532117e8c9502e953df7
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://ttraff.ru/123?keyword=last+exit+to+brooklyn+pdf', is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to lure the user to a harmful site, likely for phishing or malware distribution.

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.ru/123?keyword=last+exit+to+brooklyn+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f949cf231fcf.pdfIn PDF document text
    • https://kokejegifuro.weebly.com/uploads/1/3/4/4/134477846/javafirujurikoxirow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5f914f2e714eb.pdfIn PDF document text
    • https://velebipuzufal.weebly.com/uploads/1/3/4/4/134434208/2437975.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/sifawekujiki/analogy_paragraph_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6167/3126/files/20342499365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6189/9171/files/coreldraw_x3_shortcut_keys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5aff79e-17f7-4228-882f-a7afe9c69078/tomtom_spark_cardio__music_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9680/5028/files/11390870915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8085/2670/files/do_all_bacteria_have_dna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1795/2189/files/hungry_shark_evo_world_mod_apk.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_off00006011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 4300 bytes
SHA-256: f1ca62abdf4e198776b6dfe023e3c0f2fe1015b591d9cb40232641d9cf2a0c50
font_01_sfnt_off00006f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 5348 bytes
SHA-256: 2cdd899c0768b4b235ec7db5b4eecdd2c129cdd76546ed7f1e31e0e11249be8c
font_02_sfnt_off00008173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 11056 bytes
SHA-256: a7896e8aba5e2e3dbeeb2d9e61b3c9503edb1d74121951ad1fcd0ef4374acad5