Malicious PDF — malware analysis report

Static analysis result for SHA-256 1734589dbbc55f40…

MALICIOUS

PDF

34.0 KB Created: 2020-10-07 15:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 00f57fd432a781506c533af76dbadcc9 SHA-1: 7bd602616749a5f606addd26520bf621d3048452 SHA-256: 1734589dbbc55f40b7fa3122b6f7ab6e9c9d2e78da7c4e607849831789d68200
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body and embedded links suggest a lure to trick users into visiting potentially harmful websites, likely for SEO spam or phishing purposes. The ML classifier strongly supports the malicious nature of this PDF.

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://ggtraff.ru/strik?keyword=hallelujah+to+the+lamb+music+sheet In PDF document text
    • https://site-1039320.mozfiles.com/files/1039320/sekuvozagiwukomeboj.pdfIn PDF document text
    • https://site-1039127.mozfiles.com/files/1039127/mewogugevo.pdfIn PDF document text
    • https://site-1038948.mozfiles.com/files/1038948/83556164656.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/1/0486/2610/6528/files/the_impossible_knife_of_memory_sparknotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/soluzopejidumikaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8354/1909/files/poodle_mix_puppies_for_sale_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9026/6262/files/40882328547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/98541227204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9265/9361/files/saboganaxizozer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8776/4898/files/design_problem_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8096/2214/files/beauty_and_the_briefcase_trailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/jirogovuxixosumemagola.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_off000047bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47BD 5120 bytes
SHA-256: 377211148fe796fe59d1c3bbde64e7329f99aa9201e06c030a7f067eb456e8c2
font_01_sfnt_off00005900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5900 10128 bytes
SHA-256: 7f2b82235b8511fe932587228ceba6fc547adaec35a169ba23364e584f0add52

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