Malicious PDF — malware analysis report

Static analysis result for SHA-256 44789bbdf4902e1c…

MALICIOUS

PDF

41.3 KB Created: 2020-10-25 17:35:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7c1998a2d48b8cdfd635239d6eacada7 SHA-1: 6cce0d46b317a8410230fd5d100c4ddd83c4babe SHA-256: 44789bbdf4902e1c43d07845db9a87b7e762916efdf6f07be6f097bc6ca06938
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 heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to trick users into clicking it for a fake download. The presence of numerous embedded PDF links further supports a link farm or redirection strategy.

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=agadu+video+songs+download In PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/2331285.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/puxiperibari_vawisapusubuwo_luwotib.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/8463818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5f92fa43ab0a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f94f9c0c07f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f8ff75b1dc73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f87018187587.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/1/0432/0890/0768/files/descargar_chromecast_para_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5567/7092/files/unitary_elastic_demand_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6839/0046/files/ruferoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/popixukepifibujiguwiziku.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/fofakinujogixexe.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/tejalilipidisojijanawobos.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/23194363540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2958b6-de97-4171-9d6f-4b293cb60e96/90264253234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ff580a-82ee-4404-9b0e-485d5d13a9fa/18822898024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4482/9853/files/wokuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/4687675245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9218/4740/files/gcse_physics_energy_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3992/2625/files/fejuvonagupajawikobiko.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_off000065ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FF 5036 bytes
SHA-256: cdc09f940a69eb3036707c7a5ac629dffc7f701d0538de8d2286b9d0076d254c
font_01_sfnt_off0000774c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774C 9716 bytes
SHA-256: 48749888595d9ca653904695fbc0530a41a675b61b8469ac885c7413a21b601d

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