Malicious PDF — malware analysis report

Static analysis result for SHA-256 6021673a2ed6c822…

MALICIOUS

PDF

49.8 KB Created: 2020-10-25 19:13:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7467c96b5cbd7003452165c990f5f73c SHA-1: 3c2615b429e5a2eec1135916882becfba206fb58 SHA-256: 6021673a2ed6c822da29de473db3192a5fcd6bcd087979ad2e00481d280e736d
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 large number of embedded links, many of which point to a known malicious redirector. The primary URL identified, https://cctraff.ru/pify?keyword=repaso+ingles+tercero+primaria+pdf, is flagged as malicious. This suggests the document is designed to lure users to malicious sites, likely as part of a phishing or scam campaign.

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/pify?keyword=repaso+ingles+tercero+primaria+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f875a1331d70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f8c1f8073a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_5f93fa603cb52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f935274c772c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f8dbab0c5dc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f8fc63da982f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f8e1d974b9cb.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/xiwijagifenax.pdfIn PDF document text
    • https://zeruxexo.weebly.com/uploads/1/3/4/3/134373455/9491916.pdfIn PDF document text
    • https://gogipemefa.weebly.com/uploads/1/3/4/4/134471158/6496bded4ccea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f8de2c52de8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408176/normal_5f947788a188e.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/e4826fdd-7b3a-4139-9c6d-b241cd483e29/34962710459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95516d98-b60c-42b1-a50a-c21e1f08b871/ln46c630k1f_no_backlight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271b0a66-9966-4fce-b3ca-4e7d10d9f895/low_carb_mediterranean_diet_food_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbaeb4a-8bb4-4fa9-a55e-1c3c3894ea5f/laberintos_para_secundaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf62e7fc-0749-4166-b0ab-0ec15d18c431/condor_heroes_soundtrack_1983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6568/7197/files/frases_de_amistad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9222/3151/files/tao_law_professional_corporation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3123/3180/files/6809746601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9676/4319/files/riwetukudedejuwurukajebo.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_off000080b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B6 5484 bytes
SHA-256: fe58809b50b1bfe31c960cb2f4064709d5f4dc15a6bd8ded5f10d8320aa2a5f9
font_01_sfnt_off00009343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9343 11704 bytes
SHA-256: 98772cec603fcfc997eaa5a7a14deb0eadf87a7904deb806eef030f0f953fe6b

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