Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2c9915d405ec03…

MALICIOUS

PDF

44.7 KB Created: 2020-10-25 20:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0ac3d45ba947a0b153a12a8bafa662f6 SHA-1: 9f8efd5d453a9df4a436d82cb867a0ed1c4ead3b SHA-256: 0f2c9915d405ec03c3786127a64a9716cad1308af72b2585e646715ecdbd6344
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristic firings indicating it is a malicious redirector and part of a link farm. The document body, though partially corrupted, contains a URL that matches one of the extracted URLs, suggesting a lure to a malicious site. The presence of embedded URLs and the ML classifier's high confidence score strongly indicate a malicious intent, likely for phishing or malware distribution.

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://ttraff.club/123?keyword=sam%2527s+club+spiral+ham+cooking+instructions In PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/1a0bb2d.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/1559686.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/tabofez.pdfIn PDF document text
    • https://lavigepes.weebly.com/uploads/1/3/4/4/134437347/062e9345.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/727371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5f9317110b9f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8f479358443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5f8e280089873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f871a445316c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f8955f2e5057.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/nato_phonetic_alphabet_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/majix.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/rto_passing_list_of_maharashtra.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/aromatic_heterocyclic_chemistry_david_t_davies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b22833-5379-4a7f-bd88-f3ac3ebef1cd/gewupuzekenusidedobotiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291bf50f-ac82-414e-b44d-879c456a2674/pipamubedopusizit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/5597910998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3011/8052/files/dolixuzetobufepawivik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5651/9585/files/android_pie_version_phone.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_off00006cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 5688 bytes
SHA-256: e8f69ee5688eb75305f30ba018838ea0251b85c10e41aebd5da848d669c32ab5
font_01_sfnt_off00007ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFD 10964 bytes
SHA-256: 18ce2dd30dfaba455e16b8c2e5335d137e93ed43c44c16713e134dc24ec89906

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