Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa07254a440b9f9…

MALICIOUS

PDF

36.5 KB Created: 2020-10-16 14:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c51b98b73de91cd74cec6add430cf5ea SHA-1: f27debe73906a3e7f8723d5e9ce125f86af3e32f SHA-256: 9fa07254a440b9f99650a704b5cf9dcf18206378f7f7c2a136076b64ea455e28
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or malware delivery.

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/strik?keyword=rca+rt2911+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f8948391e7d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f88a71c4beda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f88bf484abc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f89404c523a3.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/penok.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f871191666db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f875e5f53300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8716979df90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8700d12922a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f880a06bc99e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f89725134189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f8944af6bae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f87dc259ae78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f870ed32778c.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/1/0482/3180/9176/files/9277697581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5644/2777/files/fotojaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1698/6534/files/download_aplikasi_kingroot_apk_for_android_7.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5505/3472/files/persona_5_how_to_make_neko_shogun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/4409/5153/files/85842849233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39eb39e1-cac6-4e30-a3a0-3ef8cff99767/turomigedenon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9853102e-1b02-4504-a6ee-67f4f321e041/10475744027.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_off00004ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF6 5468 bytes
SHA-256: 55ad23e164408d3dc3d4151229bb489684a79e77e266d1030f00f1cdc770bbba
font_01_sfnt_off0000627c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627C 10308 bytes
SHA-256: 6c333e5c9622fb46418c444129fcf5eef1f804d2ffce5dee7519175c1297303e

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