Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c3680c9d5cdb5c…

MALICIOUS

PDF

34.7 KB Created: 2020-10-28 05:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 030c1398a7e498fe30d888957682c8c4 SHA-1: 1efce9048d324a20f2029648012c0909698a3654 SHA-256: d3c3680c9d5cdb5c42e94d35292d718c5168ec7cfcda8d96fa589e96eb873c41
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the critical heuristic firing suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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://ttraff.ru/123?keyword=north+africa+cities+map+quiz In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8af465ea9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385613/normal_5f8c8965efc58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f8c876c2ae3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f89e936f30a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f89b9da9ac96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f888952e5dac.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/50ddefa4-d6cf-4362-8bc2-378fd8621cab/50026484228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859b9408-4491-422b-92ec-fa00acd9d99c/bagawunuwupuwugavudakagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01fb2fd8-a610-4eb1-8f26-795666c81497/3537801826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7971db0a-869b-4b57-af74-99dd662bec4f/6540002506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad39b272-3ed4-4516-a6a6-15953f7b813b/puwita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2016/3478/files/pretest_surgery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9970/8315/files/timabujizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2857/5904/files/cdc_guidelines_flu_vaccine_administration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf6b51d-6772-4ca6-b9f5-b444393a141d/95895169106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f603db-a02f-467b-8ef0-e397856cc31c/jabagugimoxezegizimale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9068/3065/files/wepenulegerabarogeluwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1387/1018/files/park_street_tavern_in_alameda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6575/5798/files/nvivo_11_software_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3360/7842/files/24348936380.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_off00004a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A7D 5368 bytes
SHA-256: 2f1464536435adfe7ba3371b3c9db0904e6216059f20334e27af8943f39a2673
font_01_sfnt_off00005cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB0 9884 bytes
SHA-256: 73ad3b3d7f7615685919bc348b4c3bc288f9a61b80937ca0ec84fb749fc68621

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