Malicious PDF — malware analysis report

Static analysis result for SHA-256 5443b02f847361e7…

MALICIOUS

PDF

43.4 KB Created: 2020-10-30 22:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8a9c37a2a7ac10eeb72f528d88048a90 SHA-1: bdd027423949b5bd3ea3277e9878f61ba84a9f0a SHA-256: 5443b02f847361e7cb11a174950d0fba0ee7f505b133137f062f8d5bc3bb9f86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain product-related text and the malicious URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic to distribute 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://ggtraff.ru/aws?keyword=power+source+battery+charger+power+supply+model+pc40 In PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/5126698.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/69937809-6469-4b67-9016-0f6ebda94615/gegilelituno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77c20b8-9459-45d8-ae82-18bda6deda8b/gugipilusiwobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5208/8477/files/wakoremade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad8a002-c1b0-429b-9ddc-8e4ad02e7b81/30878472818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/718c97bf-55df-483d-9bdf-22f824228610/34143284962.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/beckett_hockey_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/81012037357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48607acd-b6ab-4570-a120-4faf014a9a43/xoseri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7418f231-fa6a-4de0-9f16-25b2766abc24/polaroid_z2300_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/85587898613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9946/3073/files/aruba_650_controller_configuration_guide.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_off0000657f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 6052 bytes
SHA-256: 2bee0a363c80de732226a201ca1eec26beb6670c7425ebe51e6406b698b9e613
font_01_sfnt_off00007a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 11228 bytes
SHA-256: e94c3959c159c6aa76c1851284d68b4b0136ca22433ca4f4a106089024d59249

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