Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5248488a6bf004…

MALICIOUS

PDF

37.1 KB Created: 2020-10-07 20:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b106da42e81e1707ffde43cf21f1bf15 SHA-1: 65e5c7bef373e91b3e6b7c58d89d5041ae234489 SHA-256: ef5248488a6bf004bce4b1938feb7720753af4ced5a3cfa97ce9cde993901d6c
94 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to URLs that are likely part of the attack chain, including the primary malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ark+smart+breeding+guide In PDF document text
    • https://site-1043790.mozfiles.com/files/1043790/ximonolokepuworiwir.pdfIn PDF document text
    • https://site-1048222.mozfiles.com/files/1048222/kipokiz.pdfIn PDF document text
    • https://site-1038890.mozfiles.com/files/1038890/kagup.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/wifosakokavamip.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/1/0460/6948/1636/files/amazon_case_analysis_executive_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8468/4706/files/68291830848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efe1b7d-86d1-49d0-81a2-28e20e676e8f/79481170732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72cde9b9-513d-4620-9b99-5b6c128c884d/texepukipof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9708a4d2-a7f1-4c02-9694-495422ebb5de/3147365099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f8c9dd-1a84-4d26-b2dc-fb1b4ecafff8/vewesisabuvuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf1a1a2e-7fdc-43ad-87d4-ebf4d06c5c86/7135635712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5880/3100/files/51328820567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/zulutubokugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/dopurozisegubomiwevaduxuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6898/3958/files/zurexinezolonanunazal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2055/7725/files/how_to_determine_passive_wisdom_perception.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_off000053a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A5 5308 bytes
SHA-256: e18049aff9c0c54961d410420ee062bb5d4a95e0f319eb178d7b5edf5a9d20a6
font_01_sfnt_off00006598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6598 9980 bytes
SHA-256: 586a9e5ffa2b9f50544025a1b6df19455ce552f4397963d568a08cb2ba794df9

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