Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d485e2e5b8be4f3…

MALICIOUS

PDF

48.8 KB Created: 2020-11-04 08:27:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bc995188380c50efbe66e50f46f72114 SHA-1: e58e669e1d335812df14f4067a119ab4478920fe SHA-256: 2d485e2e5b8be4f33f44c6c629fd30f9ae61d23dda8421523bb1849f57e24248
154 Risk Score

Malware Insights

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

This PDF document was identified as malicious due to its inclusion of a link to a known malicious redirector, cctraff.ru. The document also contains a large number of embedded links to external PDF files, suggesting a link farm or SEO poisoning tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing attempts.

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/strik?keyword=how+to+find+average+total+assets In 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/zobuwubedak/barisan_dan_deret_bilangan_kompleks.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/jimmy_corrigan.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/18067203302.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/kobewa.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/aspirantszone_current_affairs_march_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/74640277260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4082/9351/files/cloud_is_a_piece_of_cake.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/61866126198.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/elemental_weapon_5e_spell.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/accounting_and_finance_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/flash_actionscript_2._0_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f442ea-bc52-4ede-81b7-109b7583eac0/79335377773.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/46540186091.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/hamster_for_sale_craigslist.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_off000070c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C4 4976 bytes
SHA-256: daa6d0db7012ed22a9571e07d5a7d0fe3c1a039435750ff6fa50d569e46cb543
font_01_sfnt_off000081d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D0 11248 bytes
SHA-256: d751e502444d45a62d4c67c828b78216eadad6b82188cc96b932804655d656b6
font_02_sfnt_off0000a840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA840 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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