Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1df75f3777e8d5d…

MALICIOUS

PDF

46.3 KB Created: 2020-10-08 00:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a061342cc352509ebec30a97b454dac4 SHA-1: 94323ad821ddbec388ce072c0a1cbc2d9c8e382b SHA-256: e1df75f3777e8d5d8c154d378e768f1b924c300c21fd8874b7a35bc74763e6fa
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body and embedded links suggest a lure to download a PDF, likely a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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=walking+dead+comic+pdf In PDF document text
    • http://files.moonambelps.vic.edu.au/uploads/1/3/1/3/131379730/tutexisuzovadora.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/1/0440/4844/9686/files/54442881712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/my_book_essential_2tb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1389/7372/files/the_philosophers_way_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/simple_probability_and_odds_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4971/1776/files/dancing_in_september_justin_timberlake_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe125007-41b3-49c1-9faf-1701207d308f/xomul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fbbc2e6-64b2-4af6-b9a7-b6443d29ca77/48778918430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2625bd7e-ea5a-4c33-ab26-26cfd3a683e4/dikodiruzuremato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b69951-0164-4fda-8712-960207d645a1/joxawovuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3949/1749/files/the_subversion_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5923/4984/files/nifemileguzotediwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8334/9668/files/curriculum_studies_reader_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6826/3062/files/mikigujasonosasixosewowab.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_off00007743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 5276 bytes
SHA-256: 873e627bb2493e4f38cc7ee98e60c270cfa87eff2f7bc94e1d5fca5358161a9b
font_01_sfnt_off00008941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8941 10444 bytes
SHA-256: 5ca0a983a07154574af596d6950bb7adc7d6a049539a940fc631a4d08753a1a9

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