Malicious PDF — malware analysis report

Static analysis result for SHA-256 0310e59786d342de…

MALICIOUS

PDF

40.8 KB Created: 2020-10-14 04:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2588275e378df8a2c9f6e8b203c84906 SHA-1: 7f5e56b7120cb90859160720065809fa53535b4f SHA-256: 0310e59786d342de5354c6b5585a732ce0e7a74742170da42f8c2e0d673cd3ec
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/strik?keyword=halo+sleep+sack+tog+guide, is confirmed as malicious. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt.

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://cctraff.ru/strik?keyword=halo+sleep+sack+tog+guide In 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/1c2704fc-5183-40ec-acc2-8d0d2f035978/zudeguzovikodinojupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a449375c-a6df-4a1e-8294-5fd544b9399a/56128112240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5389159a-96dc-4873-beca-1686c551f36b/76836549965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a75bd56-c55b-4400-a9fb-14d63bf929b1/67221942195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2df508-ae2a-46ac-bf56-43cb5d5ffadd/vurig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/5937300721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8104/9288/files/government_exam_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9168/0150/files/student_blue_ncsu_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8253/9698/files/13166281063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7814/6462/files/rijidalegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4584/1827/files/cobra_neighbor_haters_forums.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/time_in_st_lucia_jamaica.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_off00006124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6124 5172 bytes
SHA-256: 853f014d46e439bc6b028fbce9449045a97319c1d2b30dcae34be4071f4768ed
font_01_sfnt_off000072cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CF 10544 bytes
SHA-256: e9ac946d41eb90c2d53d465093495cf0a80814b0df58be72d3794362844f4287