Malicious PDF — malware analysis report

Static analysis result for SHA-256 58951b56e2b62ac1…

MALICIOUS

PDF

41.2 KB Created: 2020-10-03 13:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 43c83a333f90374144deda5b1ec9fdcd SHA-1: d2f24b8fc3825811b5163a81c604e4861b699f7a SHA-256: 58951b56e2b62ac10932267723a4617401c63188a25856b9c5484dbe809fc308
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 or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure. The document body contains obfuscated text and URLs, including a reference to 'Assassin's creed odyssey mirror puzzle', likely a lure. No scripts were extracted from this sample, but the embedded URLs and link farm structure indicate a malicious intent to redirect users to harmful content.

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://gettraff.ru/strik?keyword=assassin%2527s+creed+odyssey+mirror+puzzle In PDF document text
    • https://site-1036649.mozfiles.com/files/1036649/43374312936.pdfIn PDF document text
    • http://nozakixaz.mindfulsavvy.com/uploads/1/3/1/0/131070588/9ed1d0b9439e.pdfIn PDF document text
    • http://xukape.rockchurchriverside.com/uploads/1/3/0/7/130775470/1090376.pdfIn PDF document text
    • http://delubuxe.nachomamasbedandsnack.com/uploads/1/3/1/1/131164572/074723cb4a01d.pdfIn PDF document text
    • http://files.greatcondoforsale.com/uploads/1/3/1/4/131410818/lozunidudi.pdfIn PDF document text
    • http://givejipo.kingstreetbeer.ca/uploads/1/3/1/0/131070450/f00a93.pdfIn PDF document text
    • https://site-1036691.mozfiles.com/files/1036691/44406080572.pdfIn PDF document text
    • https://site-1043608.mozfiles.com/files/1043608/78976695947.pdfIn PDF document text
    • https://site-1042883.mozfiles.com/files/1042883/zidebi.pdfIn PDF document text
    • https://site-1039645.mozfiles.com/files/1039645/roxasi.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/1/0438/4138/8709/files/59320579041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/31919700716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9455/files/jazinofikeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/66238145319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5003/2549/files/duzilabikunaxapekukaxeza.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_off00006295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6295 5392 bytes
SHA-256: 83b4bb781dd285a092dbc8b11cfb89f8151f83026aca5ac678752f48905a3bc5
font_01_sfnt_off000074ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74EC 10216 bytes
SHA-256: 8e8f6678aded53d3ed4ea77651c4bb4ab7bd62922c93913f667ca8df80a81aba

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