Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e6a96d1b9da3ea…

MALICIOUS

PDF

47.2 KB Created: 2020-10-15 03:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2c427e515d37e4543f5683cb3266e4d1 SHA-1: 509cfd7bd6371f314c45dba17253b46a403411b9 SHA-256: 71e6a96d1b9da3ea5f692118594b39aeac81a0410550021ce3d96dacb069f3dc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links, many of which point to external PDF documents hosted on various platforms. One of these links, 'https://ggtraff.ru/123?keyword=radicals+worksheets+with+answers', is identified as a known malicious redirector. The document's structure and the presence of the malicious redirector suggest it is designed to lead users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=radicals+worksheets+with+answers In PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/varete.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/gumupedi.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/kanemusurupow-mogoseru-kinufi.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/9395882.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/ee8336e1.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/lonoravix.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/rujanusowijakefifa.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/1/0478/3754/4607/files/weighted_vs_unweighted_gpas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/59501746028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7766/7482/files/31287971170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/periodic_table_with_electron_configurations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cca2a39-ae04-46da-b51f-d154c571fcd1/46018975555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f604337a-69e2-4885-af6d-07b939ac6249/9655248450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc694602-f166-411a-97de-0ab0ee7bd838/58599313918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5470747a-5e54-4d6e-88df-5227a97d09de/kotakola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4444e09-9d59-4eac-8f55-8c7697cfd1aa/97375936467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8dc7cb-bf99-4e24-9627-64878368a92a/79877015397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f9c0fb-5916-4a34-893b-24457cbe9bc0/34178684428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e3f1da-4df3-497e-8344-bc96f543fe70/lopinaxabakexoxidetun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d2b4b1-9bc0-4b34-a26c-f1a815cc82c4/98364249257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e9969b-3c21-4359-acf0-72c0f7744c36/fofozawomapaviwexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1c2d78-3db7-4c90-9d15-518b59f9539a/wavaxelopozako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19c5928-e7d4-4d16-b831-c53390da441f/6788383471.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_off000079f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F0 5188 bytes
SHA-256: e0d55e7a8acc5f9d6a57b2426fdc6ed05e2a7d571dc104c7cfb926481ec5a084
font_01_sfnt_off00008b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B97 10280 bytes
SHA-256: acde9a5680a6012259dd7e15d8034ba520a3b763a98b84269cd0248ba7c5cf3f

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