Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce1c1e83b2f9f59…

MALICIOUS

PDF

59.1 KB Created: 2020-11-08 05:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9db262a4b3e40a1f791490d0ba1b5e84 SHA-1: 728b079706519a5931072236157b36e7135d49c4 SHA-256: cce1c1e83b2f9f59e7d7ccbf4ff8c47086eb3a1501d9ae0e6ed6f66cac9a33ae
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://cctraff.ru/123?keyword=iowa+high+school+softball+state+2020, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a search query. The presence of numerous external links suggests a link farm or SEO poisoning attempt, common in phishing or malware distribution campaigns.

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://cctraff.ru/123?keyword=iowa+high+school+softball+state+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f89981200cd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f875c557182a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f9877ec05891.pdfIn PDF document text
    • https://zaduwemupate.weebly.com/uploads/1/3/4/4/134464980/gitakobinezof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f874af0ca2ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f8765dcb0542.pdfIn PDF document text
    • https://rajofike.weebly.com/uploads/1/3/4/5/134500595/bamirukonu.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/13f4a2a6-4315-4268-b7a0-4b8c2b9998ab/vixunevagul.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/the_cherry_tree_by_ruskin_bond_download.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/75422946339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515b903b-3ef7-482a-baf0-3c7e8fecc63d/cineflix_hd_net_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e681f604-7fc4-48d8-bbaf-e7a5e829e668/50992913989.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/indian_food_recipes_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/44164299191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f962d8-341e-40ea-9a04-c67883c72c99/nigaripe.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_off0000a5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F5 5488 bytes
SHA-256: 260fa0691c91199251827ab139d3babdcf184d7e70066a8bf7ca122cdd88c76c
font_01_sfnt_off0000b8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C0 11420 bytes
SHA-256: 630890c3a13cafe7ff9d21648ca902237c9e4b2461fb16dabb01326aebefd501

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