Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb898ef1efc396c5…

MALICIOUS

PDF

87.7 KB Created: 2020-10-02 16:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 589956c3da3b9d2bf9bb621931b9042d SHA-1: 30680cc635fc316497ff8c20be24a0f8b6c5f0fb SHA-256: bb898ef1efc396c56c0382712dc6660a4b8af73371fcc00b6f3cc5174d0be5a0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with heuristics indicating it is a malicious redirector and a link farm. The primary malicious URL identified is https://ggtraff.ru/strik?keyword=islamism+and+islam+bassam+tibi+pdf, which is likely used to funnel victims to further malicious content. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/strik?keyword=islamism+and+islam+bassam+tibi+pdf In PDF document text
    • http://files.ndpol.com/uploads/1/3/1/4/131483201/kasaro.pdfIn PDF document text
    • http://files.baitboatkit.com/uploads/1/3/0/7/130739116/b8b9b6b35e.pdfIn PDF document text
    • http://dewata.chemotherapyresource.com/uploads/1/3/1/4/131407481/vamawomumokaf.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/1/0429/5216/3482/files/yo_antes_de_ti_libro_completo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8028/0989/files/hopper_3_remote_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3653/1614/files/regrowth_minecraft_wood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9326/6074/files/x_ray_machine_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2110/9914/files/guide_gear_monolithic_hunting_boots_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0b95091-de28-4a14-8559-6a558ed17555/givajoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e2e46a-2dfa-42ee-b676-d31669aae516/47520571501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729dd20d-1e01-4b19-8d7d-914208bfd9e0/43178371807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618c23e3-5afe-44bb-8c20-14bd08076857/20599924173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169be155-24b0-4276-ba39-b2073ecc2891/52086605275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6bd1a5c-6939-438b-bab7-875c8ae1958f/sipuxukumidoleromifoxogam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/175f9fce-27ca-4df0-8317-3740b79a25b6/fajet.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_off00011d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9C 5168 bytes
SHA-256: f06545b2a913d5aa2c58c5705c89ef2ba43eb8c7faa92fea7d09a374ecf47406
font_01_sfnt_off00012f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F19 10040 bytes
SHA-256: 34dd8cb4f8b65b9c93636298a0865efa836e475fbfa6f887d5302f9a44c155cb

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