Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2cc1f15ceda7a9b…

MALICIOUS

PDF

44.1 KB Created: 2020-11-01 19:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b5ef88c339dba577c75f1f2d083214a0 SHA-1: b6fc3caa58ab877937f6fead70b20955838fdada SHA-256: d2cc1f15ceda7a9b91738799b6765e16bc5e7130c8eda6d5b0c035c53f715e2c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for a browser extension installation lure, indicating a social-engineering attempt to trick the user into downloading potentially malicious software. It also links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/123?keyword=labview+view+image', which is a primary indicator of malicious intent. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/123?keyword=labview+view+image In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f89f2b558ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414696/normal_5f9846ef38e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8d15758ba95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f8766cda1e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f8864e106f55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f9c6be08d1cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f8fca8af2026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5f8ea0ae356bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2262f65e-3ed0-4452-a9df-a62ccefa13c5/41570101064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522ea2a1-ffcf-48f8-a754-24911828f970/64306877517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365f29bf-816b-4bcc-988f-172a18bb78c3/98548165255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a06792-1942-4487-85f7-c43b852cb50d/75061042065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6324/6485/files/21200397084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8fe74c9-3339-4b1d-a24c-4ae6f84b9234/masarozevudufizexurigoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c68739-1f9b-4f54-a2f7-f882cb0cbd4d/5334720705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb76ce7e-b350-4284-93a3-5ddac99dba17/podovasasexufif.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_off00006ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC1 4932 bytes
SHA-256: 05fd3092629349b78d154bb7ac2c1f48251b2729231b644d1e1495ca8ece7e0c
font_01_sfnt_off00007f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9A 10548 bytes
SHA-256: 7f12c7a46fd82e2439b0a59530e892ce1cb6ab98248cfad5a57aa769a061c714

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