Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4872e54f11247b…

MALICIOUS

PDF

31.8 KB Created: 2020-11-03 09:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1ed873d12156c313b0443a22dba6d2ff SHA-1: 8eff990c4d0ed4469c7fbe9fc3fb248d99c6b573 SHA-256: 0c4872e54f11247b49bd86bebd37a89be74db8258b502f6731ff427c4ce8bd0c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link disguised as a manual that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a link farm or phishing attempt, likely intended to lead users to malicious content. No scripts were extracted, but the presence of embedded URLs and the malicious redirector heuristic strongly suggest a phishing or redirection attack.

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://ttraff.com/123?keyword=dyson+v6+operating+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f927afe1d7ad.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/91da0.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/1/0432/4121/0011/files/java_tutorial_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/zonipakasut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9553/2724/files/mikesakuwojawilux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1022/7876/files/focus_on_nursing_pharmacology_7th_test_bank.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/prayer_request_form_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7910/2378/files/68894476618.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/biwisujebovaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2561/1931/files/46604475055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a242e3-c2e9-4c38-89f2-1522c8b2fb69/40141823478.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/27506394247.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_off00003fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FC9 5456 bytes
SHA-256: ef17b280f4cd61b089aa0db66ab15da5301173c29465d5e8562a0b94791165f8
font_01_sfnt_off00005256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5256 9480 bytes
SHA-256: 450f38e30cc5cd8274dc6488968aa0eaaf60fce6472a537931866356da9a68ad

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