Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d46b1756e565533…

MALICIOUS

PDF

55.0 KB Created: 2020-10-26 11:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 07a0138f174c7ef78b2fe08b2f648e49 SHA-1: e9b5d354cfcbd70469645a2c7612b4199ab3463c SHA-256: 3d46b1756e5655337f9ea3e2fd36bba5f2fb4e1b33acff7b4a6940fd9c8e9d4a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of external links, many pointing to benign Shopify domains, but one critical link to 'ttraff.com' is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to medical guidelines and the malicious URL, suggesting a lure. The ML classifier strongly indicates maliciousness, and the PDF structure is indicative of a link farm used for SEO poisoning or distributing malicious content.

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.com/123?keyword=lower+gi+bleeding+nice+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f8747cc22f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f91ec8488927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f912cc2436d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f968326429ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7107/7027/files/plantadeira_manual_para_cenoura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/eagle_american_flag_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/pronoun_worksheet_for_grade_4_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faee9bd4-ae0f-4745-957a-7999b7879d55/41809584433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ee6ec6-b12f-407f-a60f-256b37ecb0f1/sibawoken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e69b1c-673f-4c72-9588-4b1bf1050b7a/dimuzixafidezuvefevar.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/2745645819.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/paleontology_geology.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/78268708258.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/black_belt_memory.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nowimisuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5176/8731/files/hammer_black_widow_legend.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5742/9145/files/papas_burgeria_hacked_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/osprey_kestrel_48_vs_exos_48.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7276/6119/files/legizasasixubazirajip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c9a47f-2c3f-49d7-9290-a4ed52e61f99/getilumudetadateloduwibeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa3beee-6023-4910-93f9-29730d15fd79/48723957393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d764bf6-c1bf-4823-9605-d5deabfb3e68/40470186642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455f961c-8742-4009-a06b-cb83ad6c9a49/81417244771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31697124-c6bb-446b-9c1a-e476f5a2994b/227381549.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_off000098a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A8 5072 bytes
SHA-256: 9ff5ab19983cd4cdf91d00e62a57200625596535f82b96928d531d77bf59d3d4
font_01_sfnt_off0000aa0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA0D 10740 bytes
SHA-256: 072b554e57b7cf0f77a3ac55a7bccd045470528f33a0f1d2efc56d8747236346

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