Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90312c46662eb4b…

MALICIOUS

PDF

35.1 KB Created: 2020-10-25 17:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1fccdb251c0d7c2efbd41c8e2e43f2ae SHA-1: 9fa256f2e2ed2633f60dcaf6733df8c2bbd646c3 SHA-256: e90312c46662eb4b983b645c06a27728d14b81af87d4de10aa58d80c4947b9c8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One prominent link, 'https://cctraff.ru/aws?keyword=aircraft+structural+analysis+pdf', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains this malicious URL, reinforcing the intent to redirect users to potentially harmful infrastructure.

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://cctraff.ru/aws?keyword=aircraft+structural+analysis+pdf In PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/87cec15aff5.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/70388ee66.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/figarimixedavig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f8aa07477243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_5f8dff1327e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_5f8e17066f4ee.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/fivoz.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/3fbaa875ced4.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/4385049.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.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/1/0493/0640/2975/files/triangle_side_splitter_theorem_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1416/7965/files/foturigidazodirir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9065/6924/files/13186473427.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/lifunenovukojosumogaluno.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/lower_back_muscles_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4313/3352/files/your_dreams_are_mine_now_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/wipegezuxapibebozuxotate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/kyoto_map_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5140/0391/files/zone_level_guide_classic_wow.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_off00004c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C49 5240 bytes
SHA-256: 3c0440bada158a4f22117e71ccaa42f2e4d0fa10e4b24bea3550ee252c649a9c
font_01_sfnt_off00005e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E29 9640 bytes
SHA-256: a25690a76e7ee114b40b7fa279aacfa7580afc54c9e7ca97d40ea78946705e01

Open this report in the interactive analyzer, or submit your own file for analysis.